Malicious PDF — malware analysis report

Static analysis result for SHA-256 59af234cd4e9e8e1…

MALICIOUS

PDF

68.2 KB Created: 2020-12-23 11:08:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 2ffd4349c7410be81b101faab471288d SHA-1: 734be7d727deb1b5310b29d2d87e1bd3f47c7ff7 SHA-256: 59af234cd4e9e8e146075ab5cd02db75d8f9a832c08400a48b8e8be600631a13
206 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external links, with several pointing to disposable hosting services and utilizing UTM parameters, suggesting an attempt to manipulate search engine results or redirect users to malicious content. The presence of embedded URLs and the 'PDF_SEO_LINK_FARM' heuristic strongly indicate a phishing or content-luring attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://trafficel.ru/strik?utm_term=mekorama+level+22 PDF link annotation
    • https://nasefowiwawenug.weebly.com/uploads/1/3/4/1/134109082/d6fe08f.pdfIn PDF document text
    • https://vomediwanuxorat.weebly.com/uploads/1/3/4/3/134327005/5650633.pdfIn PDF document text
    • https://buxipowuno.weebly.com/uploads/1/3/4/3/134353207/desug_jibimata_fufeparupunekax_razuxal.pdfIn PDF document text
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/bef2c9f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369486/normal_5f984facbeb85.pdfIn PDF document text
    • https://rupogasonewu.weebly.com/uploads/1/3/4/6/134653860/9b72442f.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://s3.amazonaws.com/sajezife/rd_post_office_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4759f49c-431c-43ce-a360-ba63b1351f11/29728042001.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/puxedujud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/372e32fe-f666-403f-9f19-4606fb216fff/two_way_relative_frequency_table_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d16c094-e62c-4438-aa7d-5e2a1b264b05/math_problem_meme_generator.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/najuruxonuxedekuwalopax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d63aad1c-fe95-4770-92ab-bddbe692941d/puminufenajogabu.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_off0000c222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC222 4468 bytes
SHA-256: 3a801d0315480d0daed58f455dddaa12a77fa3da1e000299a7575a5d48940599
font_01_sfnt_off0000d154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD154 10736 bytes
SHA-256: 33ddeceefe0f02353c79e59e4d88dd7081365907815b6d20239e9973533c5236
font_02_sfnt_off0000f5db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DB 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

Open this report in the interactive analyzer, or submit your own file for analysis.