Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2e197918aff4de1…

MALICIOUS

PDF

80.1 KB Created: 2021-05-11 19:32:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: bdb554b98efba1e1e27bb67bcb90d77a SHA-1: 51d5c5f2a3fb7528c6984c25ac989e5310a334f2 SHA-256: e2e197918aff4de1198c9878f5a4ad9b0eb1f76d62c1c92b8229beeb900278d1
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • 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.
  • 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://fokemale.ru/strik?utm_term=james+patterson+kids+books PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369933/normal_60224b93e19c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393632/normal_60153986107f5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409604/normal_5fcdcf30589ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414847/normal_5fce839b71ccb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426815/normal_6060523346f78.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/children_s_christian_movies.pdfIn PDF document text
    • https://9a4b5e96-23fe-4021-9525-787506808755.filesusr.com/ugd/b3318b_b385ac1b0db54af8997ff92afe315f2c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/865bb48a-95e7-48bb-962b-7b21adfe4260/ferrari_logo_vector.pdfIn PDF document text
    • https://b3079848-b07e-4d89-9244-05dfa5dd91fe.filesusr.com/ugd/3ab5ed_ddf593cbb4dc46f78bdfec196eeec9dd.pdf?index=trueIn PDF document text
    • https://6cb1c90e-07cf-4522-b85d-4edd8abc33c8.filesusr.com/ugd/0c41e7_81783ef4cb834597a1d118d4a1f50355.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/free_3_fold_brochure_template_psd.pdfIn PDF document text
    • https://37e0f79d-b0c1-4727-b76d-5b759c81288f.filesusr.com/ugd/9c66ff_bdf58033e90c49f5bf76c8925df96fd0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/32083d95-8c9a-48c3-aa5e-d2c91f7499c5/william_faulkner_novel_crossword_clue.pdfIn PDF document text
    • https://80b1f93a-fe74-4439-a81d-34814fa7a505.filesusr.com/ugd/e56fe2_7b4ae5de7fd9419883fa0b9e82df23e9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd8926b9-df45-45b4-8eda-9d47dc8c5f33/how_to_get_paid_as_a_caregiver_in_colorado.pdfIn PDF document text
    • https://a3720f92-bdaa-4449-a3ff-14f36884d2d5.filesusr.com/ugd/afadc3_2592bfe071fa49a980072c0f3dbb7a3b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/episode_ignis_trophies_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dc0c879-7611-4913-a1cf-89f9a5b75566/vaxanetigup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0001758f-4b66-4acc-a0cf-4d841e2828fc/are_ilive_speakers_good.pdfIn PDF document text
    • https://9f503c4c-bf14-4dcb-9a7a-68e0e5bb3568.filesusr.com/ugd/8ac1ab_ff3d1764af9a49dd8cc0ebe240ec792f.pdf?index=trueIn PDF document text
    • https://28f2c00a-638b-45ec-8848-4d649cb6aba9.filesusr.com/ugd/946f28_fd99fafb06f14622a0dc868592b77642.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jinabom/brave_full_movie_in_tamil_dubbed.pdfIn PDF document text
    • https://2a403a33-5f6e-4534-96f9-742aa7325afc.filesusr.com/ugd/d2da83_a982b7f489dc45b081024e0f941c5de7.pdf?index=trueIn PDF document text
    • https://b5526579-b22d-45a0-8251-9885a72cf3eb.filesusr.com/ugd/0cd019_ef3aeaf4188f44eba8b114f1d33805ca.pdf?index=trueIn PDF document text
    • https://2489a575-72f7-492f-b117-28cfe4a4d2a3.filesusr.com/ugd/d81705_300e7e6a34d748cd8e20f0825cd624da.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/fexasezu.pdfIn PDF document text
    • https://db6d201d-bdff-4648-9982-d9cfaac7639e.filesusr.com/ugd/98857b_1cc5791809fa466fb8a0ae2bd1400795.pdf?index=trueIn PDF document text
    • https://0ef2f354-78a3-4528-990c-72f69c86fc6a.filesusr.com/ugd/6a0da6_ce47ef2f96994cbb9f8ee67533a6bbfc.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f89c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89C 5268 bytes
SHA-256: c60dedd979640b29df9f98b28db8332055758cdf6d231918324f3f98223b4407
font_01_sfnt_off00010a69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A69 11672 bytes
SHA-256: 36f7d4b5b00d5c0f45167de319a65640520a25f5f8cdd1f9db06066f38e83908