Malicious PDF — malware analysis report

Static analysis result for SHA-256 abf041fa774d4f11…

MALICIOUS

PDF

95.7 KB Created: 2021-06-03 08:50:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 69286070bd6ffb8638b7fb9956fb2c8b SHA-1: 21bd2940ef7f46bec244c00f674cbdf871dc0990 SHA-256: abf041fa774d4f1130ae1830741a210bea6c89e9cd51678be1e06d88f9718164
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's likely a phishing or trojan delivery mechanism. The document contains a large number of external links, suggesting it's part of a link farm designed to manipulate search engine results or redirect users to malicious sites. The presence of a download button lure further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crewmak.ru/pbw?utm_term=achutam+keshavam+ankit+batra+mp3+song+free+download PDF link annotation
    • https://zemabata.weebly.com/uploads/1/3/4/6/134677216/juzejovusowetu-lenakemanejo.pdfIn PDF document text
    • https://rokopopowatapo.weebly.com/uploads/1/3/0/9/130969888/b49105ce111.pdfIn PDF document text
    • https://tifowufiwadoxi.weebly.com/uploads/1/3/4/0/134098290/zewegekupapalil.pdfIn PDF document text
    • https://kujepilam.weebly.com/uploads/1/3/5/3/135343620/liraji.pdfIn PDF document text
    • https://zowamuzifam.weebly.com/uploads/1/3/1/1/131163536/benogexifote-gozoda.pdfIn PDF document text
    • https://xesanojazal.weebly.com/uploads/1/3/0/9/130968931/gusikanidogak.pdfIn PDF document text
    • https://kajuzenutojaso.weebly.com/uploads/1/3/4/6/134631714/92fd87ebb.pdfIn PDF document text
    • https://ziroluberunoreg.weebly.com/uploads/1/3/4/4/134456507/fa70c06789.pdfIn PDF document text
    • https://sifudalumavobu.weebly.com/uploads/1/3/2/3/132302711/furumalosageji-mutaxek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4828c28-fea6-435a-801a-b4d43c264b5a/femugiwu.pdfIn PDF document text
    • http://zixereves.pbworks.com/w/file/fetch/144532983/xakakimox.pdfIn PDF document text
    • http://papoxuva.pbworks.com/f/how_to_give_a_swedish_full_body_massage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f045c83-7d5e-4275-a0ea-353823cee8d9/what_is_the_neo_darwinian_theory_of_evolution.pdfIn PDF document text
    • http://tusawijer.pbworks.com/f/holes_anatomy_and_physiology_13th_edition_chapter_assessment_answers.pdfIn PDF document text
    • http://mapijakemifo.pbworks.com/w/file/fetch/144457860/pearson_miller_and_levine_biology_online_textbook_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec448af8-16a8-4c66-a25b-00d0e6832a71/how_to_make_a_cape_out_of_a_pillowcase.pdfIn PDF document text
    • http://lekuzax.pbworks.com/w/file/fetch/144417987/17st_6lbs_in_kg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc0b996e-b3a7-4a20-bb6f-ae3f5147242a/how_to_make_easy_experiments_at_home.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCE 3996 bytes
SHA-256: d4e91c970697d46f85fedc5246fb051302e61ce8e125279a9f1a767daa749067
font_01_sfnt_off00010df0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF0 6080 bytes
SHA-256: 2f92f9ef145fde839feb57020b44b4fdf07a2dde2a4132342dee034c564b9ce3
font_02_sfnt_off00012288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12288 12584 bytes
SHA-256: 75ef7c25d66d43c8316ef40df11e839952ce86942221dee7c0cb29d711614681
font_03_sfnt_off00014aa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AA4 16392 bytes
SHA-256: 8127b6c5849a33c5dafaebb78c17d61f77626784e25b7e0752be54b1a5723450
font_04_sfnt_off000160fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160FE 3492 bytes
SHA-256: 42382a71b622406c889e817e0798898379f72708eb2b521f6fe4c2353bc456bc

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