Malicious PDF — malware analysis report

Static analysis result for SHA-256 132024f7008fe141…

MALICIOUS

PDF

82.1 KB Created: 2020-12-16 16:05:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: d22344a70e26818764980c564d610699 SHA-1: 146201fe628cf45986dc8332b8f6d46a38150559 SHA-256: 132024f7008fe1418a9790aee3edced4f81feae3c26ed782627dd86b35166079
156 Risk Score

Malware Insights

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

This PDF was flagged as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. It contains an embedded URI pointing to 'trafffi.ru', which is likely a phishing or malicious content redirection site. The PDF also contains a large number of external links, suggesting a link farm or SEO poisoning attempt to drive traffic to malicious destinations.

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://trafffi.ru/123?utm_term=yuki+fruits+basket+english+voice+actor PDF link annotation
    • https://xipezote.weebly.com/uploads/1/3/4/8/134882979/8804481.pdfIn PDF document text
    • https://xelemurefitarag.weebly.com/uploads/1/3/4/6/134601467/vobidabedoxufis.pdfIn PDF document text
    • https://zolegezuboz.weebly.com/uploads/1/3/4/4/134462972/ruvemuj.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/d47f0d28-c9a4-4719-aefe-14a85b490e6f/jexiredikajuporimudiwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46ad9cee-3458-4436-80cc-93ded6500f51/48418370865.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fffcf96d-3f20-447b-9453-93cb6280aa40/overwatch_mercy_guide_ps4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28c08c90-3e86-46c6-bbbe-6c66faa261b9/99331395552.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6d54c40-edb0-4342-af23-a298a60a1097/53021696690.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b18bcd21-ded1-413e-b736-f5437a3094e8/cash_management.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8244a6c5-9f35-4609-b5b1-f7ce69541136/digital_camera_revista_octubre_2010.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85d57d76-3cd5-4287-8189-27bc710755d9/no_mans_sky_capital_freighter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe80ef17-a4f3-4e85-8f3f-2dcba2c75bb2/sizadux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2035e55-b627-4822-9487-485eae9265ff/rules_for_writers_9th_edition_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a19530cb-e3ca-44b9-aaef-a1ac181d97dd/types_of_artwork_names.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0532ad4-4fdf-489d-b354-fbf7851e5dc7/pathfinder_summon_monster_generator.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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_off0000f110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF110 6588 bytes
SHA-256: fa72874b8c381873b432d3b5cea9ecddba20f04e8e1c9face7d560df1136061a
font_01_sfnt_off0001018a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018A 5368 bytes
SHA-256: 835cd737d5e83ec8fee992a14ff0a4d17dc1d41bdb5e46322d9d5dd7b22f6ca4
font_02_sfnt_off000113d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D4 11568 bytes
SHA-256: 620ffeccf2e65530feb73e84b070c80f49994280532993a0c4bf3d787aaa839f

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