Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeeaa3938c08abbf…

MALICIOUS

PDF

78.0 KB Created: 2021-09-01 04:04:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 49f3f13042ecafc0475b636466ab0828 SHA-1: 762bd318348e89655c677142a81a68243b798f08 SHA-256: aeeaa3938c08abbf8f68ab7877dfea8dfbe46210326a99be26d52b856c38adc6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users. The PDF structure and embedded links indicate it is likely used as a lure for phishing attacks or to distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://laborke.ru/uplcv?utm_term=what+are+the+five+parts+of+an+information+system PDF link annotation
    • http://salon-urody-bellis.pl/images/file/xexagadoked.pdfIn PDF document text
    • http://yogo110.com/userfiles/file/jagulot.pdfIn PDF document text
    • http://musicpark-live.de/userfiles/file/9898679959.pdfIn PDF document text
    • https://ph2020.org/ckfinder/userfiles/files/riwopabugizipasowi.pdfIn PDF document text
    • http://anandamsanyal.com/userfiles/file/73201111207.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/747540092a4228bfd9dcae660e63c70b/86431157024.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160bd27d652354---91753902086.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1611be078c71ca---xakenisimepetanorulew.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160e2aff862363---61682192495.pdfIn PDF document text
    • http://jgbt.us/pds/userfiles/files/fabiweradepubez.pdfIn PDF document text
    • https://sammycar.ch/sammy/sites/default/sammyfiles/newsletterfile/85126841635.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160adbdc9da13e---14065892289.pdfIn PDF document text
    • https://radmangroup-ye.com/rgfiles/file/77639347331.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085e8c261913---gatenudusarexitesoselogo.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610d9d5b5049a---90943047337.pdfIn PDF document text
    • http://hilltop1976.com/clients/24685/File/89284100872.pdfIn PDF document text
    • http://spostojow.pl/userfiles/file/24795297641.pdfIn PDF document text
    • http://nemeckystrakac.sk/editor_uploads/files/79814149384.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/b7d776f4de7e87a56452cfd7416699e3/rotogujararibitar.pdfIn PDF document text
    • http://ridendo.cz/files/file/xubutexubageduvikuzenob.pdfIn PDF document text
    • http://goldenagegroup.vip/userfiles/file/bomavasubim.pdfIn PDF document text
    • http://nguyenquangcomputer.com/upload/ck/files/gadopujukuwuxurebiviwexu.pdfIn PDF document text
    • 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_off0000cde4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE4 16672 bytes
SHA-256: f9d209a2558a797e720cec5945ae098d38453b5f256092fe7474244852dd0c31
font_01_sfnt_off0000f8f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F6 10748 bytes
SHA-256: 58c53ab7055738df9237f4e67c9aafdd2347b16467b7ecf4fa2940faddc60da2
font_02_sfnt_off00011191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11191 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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