Malicious PDF — malware analysis report

Static analysis result for SHA-256 30d7bf12a0290a46…

MALICIOUS

PDF

79.5 KB Created: 2021-04-01 18:04:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 56dad9c822c7bd647f41859c7572571d SHA-1: 2e15d85c3c9909fc0c83ffc5b85ca0da79fa2e24 SHA-256: 30d7bf12a0290a468ef1e97b24b63e582973f7f3e043a68333be199400e77a91
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The document body text, though heavily obfuscated, contains a string related to movie downloads, which is likely a lure to attract users to click on the malicious links. The ML classifier and ClamAV detection strongly indicate malicious intent.

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.
  • 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://baarspo.ru/strik?utm_term=the+hunger+games+mockingjay+part+1+full+movie+download+300mb PDF link annotation
    • http://shopeuro.pro/advanced_dungeons_and_dragons_character_classeswbn2b.pdfIn PDF document text
    • http://gratoraama.space/92124541186ro7uz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392470/normal_5fcc0c623905c.pdfIn PDF document text
    • http://rabota-plus.club/lol_patch_10.23_release_date_philippinesa4bi0.pdfIn PDF document text
    • https://cdn.sqhk.co/livatunozasu/cibXJif/runufepedakosoxikowifi.pdfIn PDF document text
    • https://mejonozawus.weebly.com/uploads/1/3/4/0/134016798/xisugizolomok.pdfIn PDF document text
    • https://wisiwojapano.weebly.com/uploads/1/3/4/8/134896472/bereligejitaxemin.pdfIn PDF document text
    • http://fit-italy.space/vilatirimugfchr.pdfIn PDF document text
    • http://wonder-ita.fun/rejotesilitaviwefamodutafj1z3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372358/normal_6029291043f03.pdfIn PDF document text
    • https://cdn.sqhk.co/fiseguvugele/sgdcDid/ronanidixakine.pdfIn PDF document text
    • https://numetoximo.weebly.com/uploads/1/3/4/7/134717633/fedivafusunu_razot_xiloninile.pdfIn PDF document text
    • https://cdn.sqhk.co/fakobijo/WzhiQjg/space_wolf_tactics.pdfIn PDF document text
    • https://cdn.sqhk.co/sebelokili/Pjdjfid/legacy_golf_course_phoenix_real_estate.pdfIn PDF document text
    • http://rusherx.studio/razokumesiahcxb.pdfIn PDF document text
    • https://jakakatis.weebly.com/uploads/1/3/5/3/135323185/8baf0820b53cf1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384851/normal_6041db72ea674.pdfIn PDF document text
    • http://aycotoro5.xyz/fundamentals_of_microelectronics_behzad_razavi_wiley_2nd_edition_2014vy6t9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cf176ec6-4820-456b-adf9-61e5f06c968f.filesusr.com/ugd/43d598_8d6a04a8f0ac4623b76b5e3a9a34ff23.pdf?index=trueIn PDF document text
    • https://a39ac558-8fe8-437d-9e10-dc9402d6cb9c.filesusr.com/ugd/1ebe14_771e915c40734355bde13380ede2bd10.pdf?index=trueIn PDF document text
    • https://65d0a56f-4074-4e8f-9acc-29e6f8e8f663.filesusr.com/ugd/37655d_3e03b093ade54dfdb83659ad2af207b5.pdf?index=trueIn 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_off0000f637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF637 6412 bytes
SHA-256: 46b147470bb6df6d87db0ec9a0eb6d44147d91f6b247e9609714c33168959060
font_01_sfnt_off00010c07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C07 10548 bytes
SHA-256: 8f1087c4a8ddd29e43bb0deb3b02f81577b764e2df80619c6f5237347ba8c2c5