Malicious PDF — malware analysis report

Static analysis result for SHA-256 e783a56f7ca0cb13…

MALICIOUS

PDF

95.1 KB Created: 2021-08-04 01:42:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4eeaecbaafc0048e91f5674f1fc6a281 SHA-1: 3326f0a7be19cf2f6a11d9a7bb595b07633b2451 SHA-256: e783a56f7ca0cb13d213ca79bdbe92b2d3f8fdf5dd8a479fcf068bd1950e6f29
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of links, many of which point to compromised websites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were extracted, the structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • 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.
  • 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://0-50.ru/userfiles/file/56422335713.pdf In PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/2179c4db9201d180b0ffc50a2bd33580/juvawaraw.pdfIn PDF document text
    • http://textingrights.com/userfiles/files/veratanoguwotir.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/tojotawubo.pdfIn PDF document text
    • http://studioguidobarbieri.it/userfiles/files/rikilijibafigoxef.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160b87c5d21f3e---fufixodatabomulitigadu.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5e693905e5daf8c37f84c9c27bb9e42b/43439601007.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/1at832s0ithhnb8qfdm846c20m/44522183280.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16102952ac4de6---bevalatiw.pdfIn PDF document text
    • https://aadharshilaschool.org/userfiles/file/4983701614.pdfIn PDF document text
    • http://fonnepal.org/userfiles/file/52916922699.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608427fe8bdd6---76149392344.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607554b759035---wetet.pdfIn PDF document text
    • https://jungleflightchiangmai.com/Uploads/files/43587907950.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/d01757d38685bc7557bc61507b146e49/tujerar.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff87429ac3---24404043313.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/ee35b5324b2960ba146505ad32bed440/salimavuwowexirabowat.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099a5696f8da---80085166780.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc77414a923---86716681843.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5031a09c9---61664772212.pdfIn PDF document text
    • http://bulongvungtau.com/media/ftp/file/lodiwi.pdfIn PDF document text
    • https://equator-maritime.com/userfiles/file/82000976035.pdfIn PDF document text
    • https://chetanaus.org/bheru/uploadfiles/file/menogu.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/ee72441d7589636a24ae3e40a83f738e/vifekurovuwezulimejor.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/16096b8e81ca93---52361072503.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=pokemon+sun+and+moon+nds+romsmaniaPDF 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_off00011083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11083 17912 bytes
SHA-256: a2010d27af9fdef9da46f8321d6f4aa11bf6abf4ba1011e5052828ba4b6f79b1
font_01_sfnt_off00013ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EA4 10460 bytes
SHA-256: 1dbd158878d123b33aa43c75d5f3f5db159c32c8a0b13124f0dc9c591cd58d6d
font_02_sfnt_off0001565a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1565A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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