Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1bbc30adc2ce918…

MALICIOUS

PDF

84.7 KB Created: 2021-03-14 22:08:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9f7c3034c934fac5e986433d7494928 SHA-1: 28de893541c85269a77ce50dfcfdade3c7515e5a SHA-256: b1bbc30adc2ce9180614144754bf4fd50626dfd18b68ebde334568bbff9db8a7
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified by the 'PDF_SEO_LINK_FARM' heuristic, suggesting an attempt to direct users to a network of potentially malicious websites. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and a high ML score further support its malicious nature. While no scripts were explicitly extracted, the structure and heuristics point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/123?utm_term=alif+allah+jugni+song
    • https://pimazapodozem.weebly.com/uploads/1/3/2/8/132814260/mijemuraro-logalafer.pdf
    • http://vsspb.ru/956569398239gndk.pdf
    • http://vseti.life/wilopetilivobuuxe6.pdf
    • https://cdn-cms.f-static.net/uploads/4449009/normal_603a9126801ae.pdf
    • http://fuckfrsky.com/what_to_write_to_your_nephewh5x2x.pdf
    • https://gipurama.weebly.com/uploads/1/3/5/9/135966135/f36666ea17cd.pdf
    • https://static.s123-cdn-static.com/uploads/4456667/normal_6005d7575dcb3.pdf
    • https://static.s123-cdn-static.com/uploads/4444630/normal_5ff5c2aec3e02.pdf
    • https://dipabuxirakilat.weebly.com/uploads/1/3/1/0/131071076/sumoferizewoguwe.pdf
    • http://salonapp.xyz/the_captive_kingdom_summaryv9sds.pdf
    • https://cdn-cms.f-static.net/uploads/4377388/normal_5fd116d8eda4c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tokatefozude/fabutofujutulusimuduzok.pdf
    • https://uploads.strikinglycdn.com/files/bcdbcaf1-76ef-4a7f-a337-cc36da120a18/82208030833.pdf
    • https://s3.amazonaws.com/tapelu/57190675493.pdf
    • https://uploads.strikinglycdn.com/files/d9136c3b-47f2-409e-bf9c-1a6fcc65eb66/kaxozupademoxax.pdf
    • https://uploads.strikinglycdn.com/files/0578e4f6-dff8-44be-9742-19b477bbf3f0/yard_machines_21_179cc_single-stage_snow_blower_with_electric_start_manual.pdf
    • https://uploads.strikinglycdn.com/files/286a3a61-3296-4c11-a17d-864e9aeeb3cf/minn_kota_terrova_quick_release_bracket_dimensions.pdf
    • https://s3.amazonaws.com/fejenijovekozu/27626602618.pdf
    • https://uploads.strikinglycdn.com/files/13088786-5590-476d-abf1-da6e5538dfce/casio_calculator_ms-80bm.pdf
    • https://uploads.strikinglycdn.com/files/b0ca432f-5f46-48f2-9218-2de27d60bdc7/the_power_of_love_celine_dion_lyrics_translation.pdf
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f221.bin
4ab2a755a874c10306d09d482da0fa2621530a7b04a6e21f13063e3b502ea4c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF221 4996 bytes
font_01_sfnt_off0001032f.bin
2fea44f0f6d7918799c9c800498b31c94f8fa20e239b15f21bb4d29182e3a822		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1032F 11388 bytes
font_02_sfnt_off00012a3a.bin
ffd678b41925ea43f50d5ac5cd990295a530f89a53ca557ee6eaad5a9ad6f875		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A3A 17964 bytes

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