Malicious PDF — malware analysis report

Static analysis result for SHA-256 34abf551c1b23e90…

MALICIOUS

PDF

67.4 KB Created: 2020-11-10 08:29:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 793ced00466ddd557af1579eeebc6ebd SHA-1: 99584e2279643b3aab2163ae97654f5816a7e5cb SHA-256: 34abf551c1b23e90e953a8fafb88cf3574d13b513429a33cc43e40067775f013
176 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDFs, suggesting a link farm for SEO manipulation or to host malicious content. The 'SE_CALLBACK_LURE' heuristic indicates the document is designed to trick users into calling a phone number, a common tactic in phishing and tech-support scams. While no scripts were explicitly extracted, the presence of external links and the ML classification strongly suggest malicious intent, likely to facilitate further compromise or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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?keyword=hudson+sprayer+60181+manual PDF link annotation
    • https://fuwizugirizuj.weebly.com/uploads/1/3/4/6/134611345/9951389.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375080/normal_5f9c968cc2877.pdfIn PDF document text
    • https://jodawebodo.weebly.com/uploads/1/3/4/6/134634345/xipuzuxulupomolab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392470/normal_5f9657a3e7368.pdfIn PDF document text
    • https://wetolobumusu.weebly.com/uploads/1/3/4/5/134579125/vakoler_nubakimamadog_kirofisuj_gobakeside.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/xurixado/juleke.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/divetagalolotuvizarugixe.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/bojomikituwajofekidu.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/marvel_future_fight_apk_pure.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/bin_sachivalay_call_letter_download.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/the_games_we_really_want_minecraft.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/fuzotevososiluga.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_off0000badf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBADF 5464 bytes
SHA-256: 8f50361ba3b8b21ed955009225eaf6594b677474be3a15190a85ffc4191e581b
font_01_sfnt_off0000cd51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD51 10684 bytes
SHA-256: aa141ca00030fced4ef83a00f6866aae0a00048b852f35e32ca32bebc9b50d06
font_02_sfnt_off0000f135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF135 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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