Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab779a1618cbb2de…

MALICIOUS

PDF

86.5 KB Created: 2021-07-19 09:30:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 58c1aa773d34b8612510c2047f2ed2cb SHA-1: 28bb5299eb8f2e0d0fe29fd49932434f7d91b956 SHA-256: ab779a1618cbb2de3350e42e827a688aea45294d9c1abd6515d98a5013b927e3
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of a 'Macro/content-enable lure' heuristic suggests the document instructs users to enable content, a common tactic for malware droppers. Additionally, the 'Fake invoice / payment lure' heuristic points to social engineering aimed at tricking the user into interacting with the document. Numerous URLs were extracted, many of which point to compromised WordPress sites or disposable hosting, likely serving as download locations for further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4d67ef507---fonanawapim.pdf In PDF document text
    • https://tmtteks.com/files/1037117340.pdfIn PDF document text
    • http://mtjjt.com/2013/upload/article/files/210717032646115691mvnnt.pdfIn PDF document text
    • http://ceskylakros.cz/userfiles/file/kuxeri.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b600e55f29d---58670519983.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074792652409---fijanoviwusel.pdfIn PDF document text
    • https://esperanzadeavila.com/fotos/file/67333525641.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/ttsrm7he7atn9qo8a17qha63ec/1947167941.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/98a8a18beb890818d681c03a8ace4571/ratusikovifom.pdfIn PDF document text
    • http://fittbikese.hu/files/file/rufimazobujofumasivem.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6c1ebef5c---4153546114.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af8e7734db8---56719359754.pdfIn PDF document text
    • https://nepalimodelagency.com/userfiles/file/tabagevulujozafonoxuvusor.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/oh92l4en1ls19saj1saevtlh77/pademugito.pdfIn PDF document text
    • http://hrt-foto.hu/_user/file/fifaxiwe.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/tuo2bku839cc2su9m119ahs02u/21077256176.pdfIn PDF document text
    • http://belgium-ex.com/images/blog//file/80680903050.pdfIn PDF document text
    • http://sonkertrail.org/clients/9/92/9260a3c387aed4615f72c72c3a1da295/File/51495661370.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160735297ee8d2---xebafako.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/b4833caf048642c5abe4cec9f38b72e4/86753601211.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/25303005227.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080b4110f7fa---nemiwovumebedaw.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/a051ca35461fa6cfd3fbfbaf3d4768c6/8018211606.pdfIn PDF document text
    • http://mariamozharova.ru/uploads/files/kavekuvolajoxetilenitove.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+open+a+pdf+in+openofficePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000105a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A9 17476 bytes
SHA-256: 5cb2f6772ce376f05302b0c39944bd0c3e57e34d533861dbf122372dac15d449
font_02_sfnt_off00013361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13361 10376 bytes
SHA-256: 24773f52f3a9fd01f7b1e34efa91dd6c21125faebfc445438157b205a48506ab

Open this report in the interactive analyzer, or submit your own file for analysis.