Malicious PDF — malware analysis report

Static analysis result for SHA-256 61c6f2022ebbb7fc…

MALICIOUS

PDF

65.0 KB Created: 2020-11-20 02:57:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: b027b4a51d00a684d4f8bd1eef188f65 SHA-1: d1c1c1715629c74756d6e76470beb0ca3ce6e496 SHA-256: 61c6f2022ebbb7fca9c7a2db7f3db4520f79b21641ebd061deead522cf06fc39
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to manipulate search engine results. The primary URL, 'https://trafficel.ru/123?utm_term=icivics+the+road+to+civil+rights+answers', suggests a phishing or SEO spam lure. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious intent, likely to drive traffic to malicious or spam sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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/123?utm_term=icivics+the+road+to+civil+rights+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4428078/normal_5fad3d6846bc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376609/normal_5fa053f5bf8f4.pdfIn PDF document text
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/gafasadigujudu_fiwodedare.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378404/normal_5f9adc8ad35b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445731/normal_5f9ee6d63011c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379363/normal_5f9bd4fd0184e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417531/normal_5fa73d463d17e.pdfIn PDF document text
    • https://rofetavagamufup.weebly.com/uploads/1/3/4/3/134373504/5292981.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/052431f2-7c7a-4e9a-b72a-2c603417f270/capital_theatre_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb45850a-63f3-423f-949f-5f07c8c08615/31151024692.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3c2ed61-97ae-4a20-a63f-c1d858eb2f0b/ambient_technologies_remote_rct_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/monsters_inc_characters_names_mike.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/togeladosuwamifewuluko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c38507df-6b07-4e21-8b05-1691e5af83e1/giwologoxenon.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_off0000bff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFF6 5292 bytes
SHA-256: 4d30c187a83983e677689536c43cf64ff20226da1595f92a4ad9d865f844d515
font_01_sfnt_off0000d200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD200 10832 bytes
SHA-256: 7c24aa990f85fa590b590437c8ce8d7c71f8045592248ecda1c3a3bb9c6f1f06

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