Malicious PDF — malware analysis report

Static analysis result for SHA-256 179b79f69c6ee036…

MALICIOUS

PDF

78.0 KB Created: 2021-03-14 16:28:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 254d7dfbeb08ff1ad140a315661b35ae SHA-1: 49fede67169acdf1b575c073cb969ce6d4ba993e SHA-256: 179b79f69c6ee036a7c91769ca899cd1c4674b1f4a6014d26696da6b8bfb29bf
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM' suggesting a large number of outbound links. The document body, though partially corrupted, contains a question about Monopoly hotels and references to the authoring application, which is often used to generate SEO-optimized content. The presence of multiple unknown reputation URLs, including one with a 'strik' path, indicates a likely attempt to redirect users to malicious or scam-related websites. Although no scripts were explicitly extracted, the PDF structure and link farm heuristic suggest potential for embedded JavaScript or other exploit mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/strik?utm_term=how+many+hotels+can+you+get+in+monopoly
    • https://gikositaga.weebly.com/uploads/1/3/4/7/134773380/josutu_podurusubudajaj_jodadutax.pdf
    • https://vobakedipevurot.weebly.com/uploads/1/3/4/6/134661611/bemopo_mejitivuwu_belisa.pdf
    • https://kekufakaxuw.weebly.com/uploads/1/3/2/7/132740700/vijowezonusumovawu.pdf
    • https://dorikorojuj.weebly.com/uploads/1/3/3/9/133987202/1a07ea9ed8b3.pdf
    • https://puneliten.weebly.com/uploads/1/3/4/0/134040782/7269626.pdf
    • https://kuximakid.weebly.com/uploads/1/3/0/7/130739256/2290662.pdf
    • https://zapojejomelaxi.weebly.com/uploads/1/3/0/7/130775516/nagokiju.pdf
    • https://litusavetedi.weebly.com/uploads/1/3/4/4/134445261/8113946.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/155336c6-1f1c-4359-9387-546945c41cea/81750622299.pdf
    • https://6e3eaeb2-b9dd-4462-8b56-96c59beebd9a.filesusr.com/ugd/dcc11b_eeab9d9d7a93462e8436cf74a3bc41e3.pdf?index=true
    • https://s3.amazonaws.com/sesafefanulokam/aircrack-_ng_gui._exe_free.pdf
    • https://uploads.strikinglycdn.com/files/5fe3be27-5052-4771-ad0a-a853d8cf032c/olympus_em_10_review.pdf
    • https://uploads.strikinglycdn.com/files/f5e0d595-344b-45a1-ad13-ff05847bf99c/sacred_geometry_symbols_and_meanings.pdf
    • https://eee5dff6-7331-416e-acdf-593d0c386862.filesusr.com/ugd/21e9e0_ef6aa8fe72b74681a5ab855ccc918df3.pdf?index=true
    • https://a4346b84-4611-49ab-b113-80c9188ca613.filesusr.com/ugd/078c79_91393e7bdc88455e910bae4e0b928237.pdf?index=true
    • https://uploads.strikinglycdn.com/files/6de71212-fd03-4de5-a832-2c8630232490/what_are_some_examples_of_a_complete_subjective_description.pdf
    • https://uploads.strikinglycdn.com/files/a1cfc5c0-adb0-4040-8000-129baea65706/vikoxeperigawadowif.pdf
    • https://b6f97e74-198a-461d-a312-d71b9712332b.filesusr.com/ugd/a2d007_8f486980cc06488dbdc86db51ea150b9.pdf?index=true
    • https://6afed14e-2b01-442b-8c2e-11a8a6f39965.filesusr.com/ugd/46a5ae_0f5754136b974f05b187571e695fdbc3.pdf?index=true
    • https://s3.amazonaws.com/dafumuxitupav/zodiderarezazowixajuxoful.pdf
    • https://s3.amazonaws.com/zewimu/monopoly_junior_rules_free_parking.pdf
    • https://ac4cd5cf-e861-4b1b-a585-e47049f737a6.filesusr.com/ugd/843280_f0507c24c10c4ec1b63ce8fdad90ee3d.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f34e.bin
03e364332b6a17bf8df7334d137896cbca054de1baf725e1434b6adb11ecabca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF34E 5408 bytes
font_01_sfnt_off000105a7.bin
2c85130ad1415d8fdfb9549aefc67a4e407b7fc88c5e5becdb42e94092eb99ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105A7 10880 bytes

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