Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d3b2673643b21ca…

MALICIOUS

PDF

76.2 KB Created: 2021-06-01 05:51:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc01ba895d787d4b3a7e7d966841a946 SHA-1: db0424675c019680d3136e8507b5a4282336b193 SHA-256: 2d3b2673643b21ca1fa4aaba02430a4256838269638fb170109a20cc97d3b85d
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files hosted on external services. One of these links, 'https://allytemp.ru/pbw?utm_term=fnaf+world+cave+map', is directly embedded in the document. This suggests a malicious intent to redirect users to potentially harmful content or phishing sites, aligning with the ClamAV detection of 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://allytemp.ru/pbw?utm_term=fnaf+world+cave+map
    • https://cdn-cms.f-static.net/uploads/4479925/normal_5fe9607e20889.pdf
    • https://kaxokotul.weebly.com/uploads/1/3/4/3/134380066/sodowerugopaden.pdf
    • https://static.s123-cdn-static.com/uploads/4422909/normal_5ffda29798b98.pdf
    • https://woxuxafo.weebly.com/uploads/1/3/4/6/134652349/bbec828973ad6d.pdf
    • https://faromemexe.weebly.com/uploads/1/3/5/3/135399009/7032295.pdf
    • https://sakenudawajaka.weebly.com/uploads/1/3/4/5/134595508/mataramotesatim.pdf
    • https://sikufotoxatufik.weebly.com/uploads/1/3/4/4/134458503/wufagijoxu.pdf
    • https://kesupegujofoju.weebly.com/uploads/1/3/5/3/135388852/xodoxevola.pdf
    • https://xepevuke.weebly.com/uploads/1/3/0/7/130775471/28974e750.pdf
    • https://static.s123-cdn-static.com/uploads/4411500/normal_5fcf5c7d91ad6.pdf
    • https://fezewozigu.weebly.com/uploads/1/3/4/3/134318815/fugivemulovataxuz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xifilipisi.pbworks.com/w/file/fetch/144413715/66302139558.pdf
    • http://pamotekegopa.pbworks.com/w/file/fetch/144436242/learn2serve_food_handler_training_course_test_answers.pdf
    • http://mefijunov.pbworks.com/f/40031736624.pdf
    • http://nikekuva.pbworks.com/w/file/fetch/144426864/jolofejanoke.pdf
    • http://kufogokoges.pbworks.com/w/file/fetch/144435645/51955568033.pdf
    • http://sorawako.pbworks.com/f/xirofuxobibegatuwepop.pdf
    • http://xuruzinijub.pbworks.com/f/creature_3d_movie_songs_mp3_free_download.pdf
    • http://jesababa.pbworks.com/w/file/fetch/144414834/pifumosezokowuzow.pdf
    • http://giresizuloki.pbworks.com/w/file/fetch/144434451/57803980130.pdf
    • http://tisowowuduwe.pbworks.com/f/qumica_fsica_atkins_8_edicin_descargar.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec5c.bin
a5e2be86c9b32473536be7caec70e1b8a7977b02f2945191026d7c2d6a131a23		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5C 5232 bytes
font_01_sfnt_off0000fe31.bin
aba5409b88e6dab6277372d0a87516b6f0912d9605f2d44030cb9305e3c8072c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE31 11124 bytes

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