Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad1a4a78e36179f0…

MALICIOUS

PDF

90.7 KB Created: 2021-06-01 06:41:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 08793aae79c5e2dd5e6b12739a35ee03 SHA-1: 99dca7c56ff6d3bed3d2ac8c985076b6032a73ad SHA-256: ad1a4a78e36179f0cb235b4e97f002b50173cad3ae0af1e7b2a24d19ce6d600b
186 Risk Score

Malware Insights

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

This PDF document was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external URLs, including a suspicious domain associated with affiliate marketing. The PDF structure and embedded content suggest it is designed to exploit users by leading them to potentially harmful or deceptive websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://pixomot.ru/pbw?utm_term=affiliate+marketing+emarketing+institute+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378386/normal_60621f0f1174d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451374/normal_604efc1f33f51.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416929/normal_5fc6499b73e55.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459054/normal_6006204aec585.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404980/normal_5fe7fec7bff84.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495684/normal_5ffa89b22be3e.pdfIn PDF document text
    • https://sezorataxij.weebly.com/uploads/1/3/4/6/134600708/basex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427080/normal_600a491910c78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384640/normal_6011edb33fb6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490936/normal_60269bf9255b1.pdfIn PDF document text
    • https://vivorewipaxuje.weebly.com/uploads/1/3/4/3/134365477/volegeji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365636/normal_6029355957882.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378170/normal_5fdca62d1e16c.pdfIn PDF document text
    • https://warimeso.weebly.com/uploads/1/3/4/7/134720830/ritudibevupu.pdfIn PDF document text
    • https://toxujubew.weebly.com/uploads/1/3/1/4/131437446/88e27ac482c5308.pdfIn PDF document text
    • https://guzesunidami.weebly.com/uploads/1/3/0/8/130873942/mugogat-sutirorisu-jotetu-xigosanuga.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
    • https://uploads.strikinglycdn.com/files/c8b1bba9-9ca4-4b90-9129-f214c0ed297e/16777574487.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/566dbaea-3914-4022-9d20-d163c8568c04/69963713867.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98852c00-e4aa-4d25-adcc-e6ea95ea081d/how_to_integrate_csc3x.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23eb507e-58fc-40b4-aa2d-7cddaa37dc7f/plants_vs_zombies_garden_warfare_2_beginners_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e82c3d0c-9e3a-4330-aaad-114c70a95cb5/what_is_meant_by_dawn_and_dusk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf9f8bc9-9edb-4637-975a-f100c64b3a68/life_of_fred_apples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b573fa7-248f-4021-9a28-fa91cc1eee1b/1503430470.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a06a306f-6427-4a29-8ffb-28c9ae05e47b/cambridge_vocabulary_for_ielts_advanced_with_answers_and_audio_cd_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/941fecc3-c002-47eb-bc88-b0d5ee8ddb62/51946823819.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000114f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114F8 5004 bytes
SHA-256: db10affa9afbd7176e2341218ae4db997d6afa2199b3ae4a213ebcbae1397ad4
font_01_sfnt_off000125f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125F2 11396 bytes
SHA-256: 98a5866211dc031e589ae6da19c3a475766d2ed8db98dee3cadbbeb698ff4cf3
font_02_sfnt_off00014ce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CE4 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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