Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f63e9dcbaa6cff9…

MALICIOUS

PDF

80.1 KB Created: 2021-06-01 05:48:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 03671fa3fcc798c50202b49ed7909d7e SHA-1: d877476a3f8e8d0192b473f47d3624b8e288f766 SHA-256: 6f63e9dcbaa6cff94ecb7cf48ed2856851bc840d94c25245c93f20a3122a4c93
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The document body contains text related to a religious surah, likely a lure to disguise the malicious intent of redirecting users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crewmak.ru/pbw?utm_term=kafirun+suresinin+fazileti PDF link annotation
    • https://zudezujom.weebly.com/uploads/1/3/1/3/131384555/kuzapogibivu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458833/normal_60278bd1e1e37.pdfIn PDF document text
    • https://nubamosotaz.weebly.com/uploads/1/3/1/3/131383510/gosowusenu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447270/normal_60158c18d114a.pdfIn PDF document text
    • https://basitonivi.weebly.com/uploads/1/3/4/5/134584834/1037213.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368763/normal_604d05e494e66.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476567/normal_5fe4d5fff4065.pdfIn PDF document text
    • https://gimebupezepufo.weebly.com/uploads/1/3/4/5/134507041/tafabobupi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403140/normal_6001ebf681039.pdfIn PDF document text
    • https://mitexasax.weebly.com/uploads/1/3/1/8/131857270/lowevejigatajodu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425913/normal_5ffd4b2e38643.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375700/normal_606548edc39f4.pdfIn PDF document text
    • https://dopotixoniwatom.weebly.com/uploads/1/3/1/0/131070918/b5d1172a86c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443802/normal_603c24c3921b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417426/normal_6024ee0b5792a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481539/normal_605ffde9e0261.pdfIn PDF document text
    • https://jibeguviju.weebly.com/uploads/1/3/4/7/134723477/jenazuwo_lidubop_ridegari_doledipomi.pdfIn PDF document text
    • https://jukirabupunux.weebly.com/uploads/1/3/0/8/130874410/6854542.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
    • http://paderukut.pbworks.com/w/file/fetch/144440262/61305715863.pdfIn PDF document text
    • http://bemulopawed.pbworks.com/f/virivotupodimatuxafojej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/617d249b-bdae-4ee6-bb0d-ccefa2c7ead5/why_wont_my_amazon_echo_dot_connect_to_the_internet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bd77af7-ae9c-450a-8790-e08f3432581b/55047392240.pdfIn PDF document text
    • http://niwomif.pbworks.com/w/file/fetch/144419874/17168598790.pdfIn PDF document text
    • http://ziduzobif.pbworks.com/w/file/fetch/144439377/pestle_analysis_of_starbucks_in_singapore.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC58 4552 bytes
SHA-256: 4b1485ded4864206a16231416dedf2f86b03518aaa37dcdd441698d092485a2c
font_01_sfnt_off0000fbd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD7 12632 bytes
SHA-256: 5a3d6b090eecc1c48975306e1dd8590eeac07fc8ff4601ecc4d9f297a2aa43f3
font_02_sfnt_off0001235f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1235F 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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