Malicious PDF — malware analysis report

Static analysis result for SHA-256 5197b78a32368a3c…

MALICIOUS

PDF

76.3 KB Created: 2021-03-09 04:21:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 3e6073bc2e8c12eb3cef6274544397f5 SHA-1: 1459ea2ea3fddfff0f9ce3bd17698d00535e12a2 SHA-256: 5197b78a32368a3cdfa495fd5e925d8e6789fea7275c98951a3b410a26ad124c
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to resume templates, which is often used in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://maypoin.ru/123?utm_term=early+childhood+teacher+resume+template PDF link annotation
    • http://befotuke.mywebcommunity.org/what_is_meaning_of_public_administration_in_marathi.pdfIn PDF document text
    • http://lebepufu.mypressonline.com/japanese_grammar_textbook.pdfIn PDF document text
    • http://drenajkrasnodar.ru/how_to_become_a_vet_assistant_australia657px.pdfIn PDF document text
    • http://mpvideo.org/james_and_the_giant_peach_book_reviewconk4.pdfIn PDF document text
    • http://barajofa.mywebcommunity.org/tenuzawusopebuledefuli.pdfIn PDF document text
    • https://zubowosusotikip.weebly.com/uploads/1/3/1/6/131637009/7862733.pdfIn PDF document text
    • https://fonomekaleguv.weebly.com/uploads/1/3/5/3/135308628/e08ac8adad4d63d.pdfIn PDF document text
    • https://wuxebejodivo.weebly.com/uploads/1/3/6/0/136030931/ba244d4.pdfIn PDF document text
    • http://item-get.top/1732327736tr4jx.pdfIn PDF document text
    • https://mebijanuwirat.weebly.com/uploads/1/3/4/0/134042853/limuzevani.pdfIn PDF document text
    • https://nolutoxut.weebly.com/uploads/1/3/4/6/134683805/tufagugavavijutarawe.pdfIn PDF document text
    • https://vakogupomuniv.weebly.com/uploads/1/3/4/6/134610568/kurubo-jusix.pdfIn PDF document text
    • http://gixapedotamerow.mywebcommunity.org/the_good_wife_synopsis_korean_drama.pdfIn PDF document text
    • https://mumovukejepi.weebly.com/uploads/1/3/1/4/131483147/1509279.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vinegufoxa.rf.gd/little_baby_photos_hd.pdfIn PDF document text
    • http://wepevugisotuz.epizy.com/96532006114.pdfIn PDF document text
    • http://dozonexupiwef.epizy.com/44891339649.pdfIn PDF document text
    • http://jafigufukuwixo.rf.gd/biology_class_9_notes_download.pdfIn PDF document text
    • http://nabulegewuwal.myartsonline.com/67159623805.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC12 5372 bytes
SHA-256: 60c08a49031e152e1dcf66381439e5a428c7993bb620382f7a9fe25f2fe7ca8e
font_01_sfnt_off0000fe35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE35 10996 bytes
SHA-256: 9f2111f84c0d69f61568ac3a624ecb6a45ae7362817d886caab78a1abe8e7ad9

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