Malicious PDF — malware analysis report

Static analysis result for SHA-256 97d62764b90b0fc0…

MALICIOUS

PDF

87.6 KB Created: 2021-05-16 19:44:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 047da2c1d8dd123c9e85a12a402ae96b SHA-1: aefad418b114a7f32327f2bc482527505616b1f6 SHA-256: 97d62764b90b0fc0d8749e7939076f54a5a7cb1215cf414e1eb63e2a88676f30
186 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a significant number of embedded external links, many pointing to disposable hosting services, characteristic of link farms or phishing lures. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external URLs suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gimoguvi.ru/strik?utm_term=are+old+fossil+watches+worth+anything PDF link annotation
    • https://doselarifiniwa.weebly.com/uploads/1/3/2/8/132814949/4048226.pdfIn PDF document text
    • https://rajuvafawomok.weebly.com/uploads/1/3/4/4/134455823/1972520.pdfIn PDF document text
    • http://mowefopovog.mywebcommunity.org/13068189651.pdfIn PDF document text
    • https://vizosajigu.weebly.com/uploads/1/3/1/3/131381839/4142011.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408195/normal_5fed4a0198436.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497368/normal_603618718392c.pdfIn PDF document text
    • http://bometaximom.scienceontheweb.net/lovezamebalerudixu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387715/normal_5ff06ca4aace7.pdfIn PDF document text
    • https://nibolujadi.weebly.com/uploads/1/3/1/3/131381302/gelirabezawete.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401712/normal_5fea40941a431.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409413/normal_6021a56e43c9b.pdfIn PDF document text
    • http://mogimetekojubar.scienceontheweb.net/aldous_huxley.pdfIn PDF document text
    • http://jofifuneku.medianewsonline.com/inverter_welding_machine_circuit.pdfIn PDF document text
    • https://vadutebo.weebly.com/uploads/1/3/4/8/134889136/miwolufivowelegif.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://ec5c17a1-061e-4a2c-a9e6-b3561ba71229.filesusr.com/ugd/299074_9ca97202e4254734a98fba7f307ccd75.pdf?index=trueIn PDF document text
    • https://0296ecfc-28ae-4fa5-925c-67a25994cace.filesusr.com/ugd/c88839_b6efb9d9d15b4a7887c56731dbb4a6d8.pdf?index=trueIn PDF document text
    • https://e905a76e-7bc1-418c-be29-e8eda1603e86.filesusr.com/ugd/3fb32a_173a079ae17b44f1b7326b2c8556e8ee.pdf?index=trueIn PDF document text
    • https://50b7e5d6-ab0e-41ff-bbcb-47d024e5c277.filesusr.com/ugd/45d8ab_7a6040053f224e468b11242bfaf5984b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/605bf88d-13e6-46f2-98dd-abfc0481f598/kijifeladaso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65e1d680-6b25-41f6-9c9a-f40ef0956527/ace_personal_trainer_course_in_delhi.pdfIn PDF document text
    • https://f1ddcea9-c323-452c-a4d3-aaefec61e50a.filesusr.com/ugd/defd8a_11ccc511a55d45608ce8bc1d9f3a8771.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_off00010513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10513 5252 bytes
SHA-256: 5aa183481007121e736cef5d1ef1f56137565269f6343c79e92e9c99bdf5cb2d
font_01_sfnt_off000116fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116FC 12512 bytes
SHA-256: f344770a84bb3d011162228347f09768c706aa37a80ac8c9e2fbc3f2ca5ef08a
font_02_sfnt_off0001412d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1412D 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f