Malicious PDF — malware analysis report

Static analysis result for SHA-256 947a6eabc5d0149d…

MALICIOUS

PDF

77.8 KB Created: 2021-03-14 18:15:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b71f47a6da764fb49d178afbdefc9e47 SHA-1: b301550afdb02d90abbe495e5f98938720abe710 SHA-256: 947a6eabc5d0149d3f0d5086c327f27f623473d4ea30276d5ec908c4d05a7fc4
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 0.9998

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://dugedepap.ru/strik?utm_term=harriet+tubman+book+by+black+author PDF link annotation
    • http://makeyourself.xyz/low_carbohydrate_ketogenic_diet_plansnqjc.pdfIn PDF document text
    • https://wapexuji.weebly.com/uploads/1/3/5/3/135329723/77f5f617335315.pdfIn PDF document text
    • https://xorapuwo.weebly.com/uploads/1/3/0/8/130873927/vituriw_dibela.pdfIn PDF document text
    • https://senamevab.weebly.com/uploads/1/3/4/6/134689233/fowolusa.pdfIn PDF document text
    • http://bu-markett.com/motorola_tz710_resetueudx.pdfIn PDF document text
    • https://rekasefuwe.weebly.com/uploads/1/3/0/9/130969231/a4d0fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457560/normal_5ffcbb073c464.pdfIn PDF document text
    • https://kefejuze.weebly.com/uploads/1/3/1/6/131606268/6370024.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393033/normal_5febf4f41f5ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374688/normal_5ffa4fd22bb79.pdfIn PDF document text
    • https://pomisefinare.weebly.com/uploads/1/3/4/9/134902228/1541688.pdfIn PDF document text
    • https://retowukiri.weebly.com/uploads/1/3/4/5/134592720/rutatobofowid_lukimeki_zewasagu_xetewenumalosi.pdfIn PDF document text
    • https://lemarowaverixax.weebly.com/uploads/1/3/4/3/134371099/zufofofifobak.pdfIn PDF document text
    • https://rixatesar.weebly.com/uploads/1/3/1/8/131871899/kitorivewux_xituxulojimoma.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/ge_carestation_650_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zozofufulolig/segiporadureb.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/7066499844.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/backup_android_to_mac_os.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f44e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF44E 5128 bytes
SHA-256: 0cdeb951450828e0fb3c5b3d186a53ec08c09f5314a9b18f6d374317fc79fbac
font_01_sfnt_off0001059e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1059E 10924 bytes
SHA-256: 8d7efcd5f9e060b2e2cc700ee8450ea87e34c8bb5cab15942a1fea94b21a1590

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