Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0eb05f0dae144e0…

MALICIOUS

PDF

77.9 KB Created: 2021-03-31 11:35:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 90d6af2e00c1e7a659cbde5ecc925b50 SHA-1: 53ccdd13af4246fc456b92fe6bf5e4de913739ac SHA-256: a0eb05f0dae144e0fb706ada6c2fd224cbb6754f3b32113a5abfb6320251491c
186 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links to external websites, many of which are hosted on disposable domains or appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or SEO abuse. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jumiwimov.ru/strik?utm_term=can+i+use+my+phone+as+a+dvd+remote PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4402718/normal_601f46c25f583.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411932/normal_603b8cd937f83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451350/normal_6059409e90912.pdfIn PDF document text
    • https://mupipuko.weebly.com/uploads/1/3/4/3/134370635/tadelebazapexuxumav.pdfIn PDF document text
    • http://tideparipawovu.mygamesonline.org/czasy_przysze_jzyk_angielski.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459636/normal_600f49ca6ebff.pdfIn PDF document text
    • https://waboralitenir.weebly.com/uploads/1/3/4/5/134504299/a1310a5.pdfIn PDF document text
    • https://kumobavogi.weebly.com/uploads/1/3/2/3/132303339/bawepuri_parotemej_pubotekapazun.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369486/normal_5feead604801c.pdfIn PDF document text
    • http://mekujoviwe.mypressonline.com/the_five_love_languages_for_married_couples.pdfIn PDF document text
    • http://lazisirogabidir.mypressonline.com/95607574833.pdfIn PDF document text
    • https://susominen.weebly.com/uploads/1/3/4/7/134714937/e203901f983a4a8.pdfIn PDF document text
    • http://saxobupazes.sportsontheweb.net/zavolejuwerilin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/95035127-7580-4a9f-b348-0ba68544c3f1/42005735932.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75f63644-a68b-4fc8-b710-d6a98992a043/tibifibumudokazobuniz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6060ce28-64c8-4003-919b-a176b622ffca/71760811774.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc618b95-d541-4547-a4df-341cf4363d59/2005_dodge_grand_caravan_shifting_problems.pdfIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/autocad_2020_tutorial_for_beginners_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3e988a9-10fa-4e65-81fb-593576f34572/bartok_mikrokosmos_volume_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdd3a102-34f8-4761-adc7-f22f3f8096e2/xebesusujulobofelevutojo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a78dc0a-d2ee-4690-90d9-331836bc6558/98171425179.pdfIn PDF document text
    • http://milebulijulami.onlinewebshop.net/23360313933.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF136 5236 bytes
SHA-256: 5e1291d6d167e8689a538f85087682acf8bde2be32d46a25020e30260760a369
font_01_sfnt_off000102e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E3 11452 bytes
SHA-256: 8b61d3ccce0424808de4938eb801a92ab93f0e64470c7f70892c0dfd45afaeb0