Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ff0f48cd85094a3…

MALICIOUS

PDF

85.0 KB Created: 2020-12-20 19:28:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: b0167d9becc74649d4a63776bc72e01c SHA-1: 900dbc5e9e59b2d8508471976e4be4ac2ff517dd SHA-256: 7ff0f48cd85094a3f846c6bb21a276b6949d7a0d14cb7c78650474eeb7ab845b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffking.ru/strik?utm_term=sample+iep+for+autistic+high+school+student PDF link annotation
    • https://puxinatax.weebly.com/uploads/1/3/5/2/135295704/88390.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jewizopukuni/84066431153.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef51c5cb-8b82-48ae-a6e2-1c36dc8a39fe/zazekajezovitaget.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc375e3ab79f442f239d171/t/5fc7c80c8c4551503fee928c/1606928396481/hockeytvaan_norra_b.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/basketry_merit_badge_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fde987dd61098631976af48/t/5fdeec79892c8943b0b89e62/1608445049510/f-_secure_freedome_vpn_apk_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1162b68612547ed5f39f0/t/5fc1470ff81c9a2a0cd11502/1606502160195/1920s_mens_clothing_for_sale_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/53198294541.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3d919ea-3d75-44a2-9762-27882e6ccd10/zunaduwezunipanamosere.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf39a6457125654ff7052/1606284191208/65004288739.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce2c2dccd2b773201d942a/t/5fd655feacac596b0cb891cd/1607882244757/susaxipun.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001023f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023F 5556 bytes
SHA-256: 2552d5fdab26f7fa6a6a13cb15be60e95e5040ac87bf72d043cc8455c644edf8
font_01_sfnt_off000114f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114F3 10460 bytes
SHA-256: 156acb93b401ded3fb2ac6db8916bd059ef6b6dfc3956a00c7b6b4918ec40004
font_02_sfnt_off000138bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138BF 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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