Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1a546adbe54cb6f…

MALICIOUS

PDF

116.3 KB Created: 2020-12-21 17:48:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 78cfb1b1a520516e913349ce9a08e1db SHA-1: e7f23a66127d82eb13cb528756618d4b8aace550 SHA-256: a1a546adbe54cb6f28a4c4829c6a3e5114ccc9885d88cc0bc748a8855791f1a9
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it's designed to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://traffking.ru/aws?utm_term=manual+de+convivencia+instituto+champagnat+pasto PDF link annotation
    • https://wefapewirevuvik.weebly.com/uploads/1/3/4/6/134667644/padepemepavo.pdfIn PDF document text
    • https://rasozonikazip.weebly.com/uploads/1/3/4/9/134904665/voforigapokuli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485718/normal_5fbf6858806c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382953/normal_5f923cb40068a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406463/normal_5fdef62a54b7c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463543/normal_5fdea0855cd1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451750/normal_5fbc34b017480.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/72fd8b66-be6d-455c-be48-80aef4f9a791/povevulunum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/917b647b-7eac-46f0-b32a-b1d213affe75/amana_tandem_7300_dryer_thermal_fuse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffe1a244-edf3-49a3-ad4b-8f8640d6fb79/female_chastity_belts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2063725-f33b-4d40-8ff1-77f95e4afc52/schwinn_airdyne_ad3_review.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17321 5336 bytes
SHA-256: 3a3b2530d2f84cbb4e5969d152b0ee69d0e097b0699d63da3dc2a53cb156ccd6
font_01_sfnt_off00018524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18524 3720 bytes
SHA-256: 6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
font_02_sfnt_off00019087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19087 11284 bytes
SHA-256: 8d69f13df91433fff498b56f10cd607514c7ea1142add194a8e7b7f3c7ff2fc9
font_03_sfnt_off0001b573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B573 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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