Malicious PDF — malware analysis report

Static analysis result for SHA-256 7590f6771084ed3b…

MALICIOUS

PDF

125.1 KB Created: 2021-01-16 14:47:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 70819cc668f7a899557b0065839134a8 SHA-1: c5a5ea2843611dc8cb3ea943f12d3c03120fb446 SHA-256: 7590f6771084ed3b78ed53cc66f700b57cf544706042bf4787d424bce145294c
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 0.9994

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://trafficel.ru/123?utm_term=poe+essence+corruption+cheat+sheet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4451212/normal_5ff262db4ac78.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385011/normal_5fddc22b61a3c.pdfIn PDF document text
    • https://site-1167973.mozfiles.com/files/1167973/sand_bream_fish_taste.pdfIn PDF document text
    • https://kimiragijasem.weebly.com/uploads/1/3/4/0/134096233/rowejiribanomomavi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421983/normal_5faf5bbb48072.pdfIn PDF document text
    • https://rovafuped.weebly.com/uploads/1/3/4/5/134590195/9675726.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366341/normal_5ff37f1f2d934.pdfIn PDF document text
    • https://tojalalegeb.weebly.com/uploads/1/3/4/5/134584715/zofifesakujeju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490273/normal_5fd9012adfdb5.pdfIn PDF document text
    • https://site-1254116.mozfiles.com/files/1254116/maternity_leave_form_nj.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/sugaguxagu/zifuviketofevenazobigox.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/16449677449.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/jj_did_tie_buckle.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/5340786063.pdfIn PDF document text
    • https://s3.amazonaws.com/xowasosuf/bible_verses_on_prayers_being_answered.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018cdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18CDB 4872 bytes
SHA-256: 7e22ef2b3712a3a12d16d18ab1828bf62354bb0e51276e52626f69eb34ff5038
font_01_sfnt_off00019d58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D58 10924 bytes
SHA-256: d50e981bc760af790d4f91a11984b026a33e01c211bfdfcaaa49d02623756814
font_02_sfnt_off0001c201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C201 16348 bytes
SHA-256: 50bf9bcf4531f643876cb8121bbb10b4ce9097e025417e1d1cb7f3801953ec5d
font_03_sfnt_off0001d7db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D7DB 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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