Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf3d6e1cff546563…

MALICIOUS

PDF

86.2 KB Created: 2021-03-13 17:41:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d1183c35ffb27666d881d87ff21ecafa SHA-1: e97c4ce56ca8078a29b6cc8c4c75a696da650ff5 SHA-256: bf3d6e1cff5465631241b3b7bf99e930bf8a9deace82215a39e9ff1c2de4b18e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9992

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 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://golowaki.ru/award?keyword=calend%25C3%25A1rio+2020+com+feriados+pdf PDF link annotation
    • https://vilofezilo.weebly.com/uploads/1/3/0/7/130740065/2585437.pdfIn PDF document text
    • https://cdn.sqhk.co/terodekijur/gYifigE/duck_hunting_texas_panhandle.pdfIn PDF document text
    • https://durupojivuzebip.weebly.com/uploads/1/3/1/8/131856887/vokoxonexin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422163/normal_60002645b0aa9.pdfIn PDF document text
    • http://afracheat1.xyz/luwigiwumoqy62j.pdfIn PDF document text
    • http://lovemecompletely.com/maru_varthai_song_mp3_downloadznmtp.pdfIn PDF document text
    • http://soul-felt.com/67648812417sbzf1.pdfIn PDF document text
    • http://top-salez.site/imagine_dragons_thunder_lyrics_songofxt8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369911/normal_60228e567a9b1.pdfIn PDF document text
    • http://palupalukagu.mygamesonline.org/72111561898.pdfIn PDF document text
    • https://cdn.sqhk.co/menekilebuz/SjcjjkC/mibizudasabax.pdfIn PDF document text
    • http://rowowesofazov.medianewsonline.com/80130336396.pdfIn PDF document text
    • https://cdn.sqhk.co/gijimexuv/1ib6giG/sedazesafujagemav.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzuvazol/Miijtha/bigevixenovikaralefaxo.pdfIn PDF document text
    • http://uscarins.info/quran_word_by_word_bangla_translationbgvrx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407795/normal_6013f11b05042.pdfIn PDF document text
    • https://cdn.sqhk.co/gijesali/cwpijUE/52794446227.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402940/normal_600adf4915fbe.pdfIn PDF document text
    • https://tokoposejod.weebly.com/uploads/1/3/1/3/131380771/677e6f.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
    • http://gozuketitara.onlinewebshop.net/vapesutolijowitozol.pdfIn PDF document text
    • http://vilumepidiwego.myartsonline.com/university_physics_solutions_manual_12th_edition.pdfIn PDF document text
    • https://45180a89-8b92-4d54-a4c6-cdf0ad6af3c7.filesusr.com/ugd/2b98a3_43dced4c949144729c7f45a9f134e346.pdf?index=trueIn PDF document text
    • https://caa91486-5fcc-43b7-8b2b-5b817ae85bbe.filesusr.com/ugd/26bbcf_09156dea0d5b40d695061c0f0a935cdc.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10184 5540 bytes
SHA-256: 3ead4865153d3ca9fc7a99b4b31eaae5fe21cf3942866e1459131b2ff8cd0f25
font_01_sfnt_off000113ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113AD 13076 bytes
SHA-256: f39e51722f6baf2782d21697c1969bde3b97646b20e2fd60b09a31f2414058a2
font_02_sfnt_off00013b4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B4F 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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