Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9d3578b60388e80…

MALICIOUS

PDF

88.9 KB Created: 2021-03-08 15:37:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ace15c434314a687afaa6191322e0bc SHA-1: 93a40f1defbe8247bc5b12018d1118e6b09738fa SHA-256: e9d3578b60388e80c23c8aba2b75bc77d44ddd996085e7dff8228a27f67ff8a1
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a malicious intent to redirect users to potentially harmful sites. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and numerous embedded URLs indicate it's designed to lead users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://maypoin.ru/award?keyword=bodyweight+workout+schedule+pdf
    • http://dwatches.site/67489020627k8a8f.pdf
    • https://diwowure.weebly.com/uploads/1/3/4/5/134592565/65897021.pdf
    • https://static.s123-cdn-static.com/uploads/4478670/normal_5fe53038396c9.pdf
    • https://rurusoweloxefug.weebly.com/uploads/1/3/3/9/133989150/34e68850.pdf
    • https://cdn-cms.f-static.net/uploads/4374963/normal_5fd9c09a77625.pdf
    • https://static.s123-cdn-static.com/uploads/4502833/normal_5fc97817eaf57.pdf
    • http://goodnatural.space/zuzifu6s0zx.pdf
    • https://static.s123-cdn-static.com/uploads/4385014/normal_5fdd924982a01.pdf
    • https://weruvuwixaxo.weebly.com/uploads/1/3/5/9/135972833/2838158.pdf
    • https://tuganokume.weebly.com/uploads/1/3/1/4/131452880/fefego.pdf
    • https://naziwimirup.weebly.com/uploads/1/3/4/3/134371197/120204b19f714c.pdf
    • http://dress-russia.ru/88714317276xdlx8.pdf
    • https://cdn-cms.f-static.net/uploads/4448103/normal_602e7c6835c44.pdf
    • http://xuvepawa.iblogger.org/26439007982.pdf
    • https://static.s123-cdn-static.com/uploads/4420930/normal_5ffe0034d03e1.pdf
    • http://premiumpornclips.com/tusalemedo2jx0.pdf
    • https://cdn-cms.f-static.net/uploads/4462681/normal_5fd873cda0d5e.pdf
    • http://simkosa.website/fafavifuvujozjboyu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://lufefavi.epizy.com/commodore_64_for_sale_nz.pdf
    • http://riwevanopa.epizy.com/cub_cadet_lt1050.pdf
    • http://damugiwixosaxo.epizy.com/new_oxford_thesaurus_of_english.pdf
    • https://a9750898-a066-404d-a796-54a2f5ad13bb.filesusr.com/ugd/60231a_bb3a0f7a3a4748168bf6103badc33cc3.pdf?index=true
    • https://2a983b51-2e13-4971-8c1f-a5bca3ab4353.filesusr.com/ugd/e1a791_0b27e7348ccc4686851e730b6b12ca52.pdf?index=true
    • https://db6d201d-bdff-4648-9982-d9cfaac7639e.filesusr.com/ugd/98857b_5bfef6fd7e6147f99df802ad78400c76.pdf?index=true
    • http://pasobopupolom.rf.gd/8434681514.pdf
    • https://981168d4-05fc-44b6-871d-73371d7e8cf1.filesusr.com/ugd/87d215_5a997c96a7cd4e4a9ea56a5128f31359.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001129f.bin
3c778a4cdaf70bac43e033ef59d01087814c6c7730c6308ec58600faef50524b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1129F 5292 bytes
font_01_sfnt_off000124d8.bin
cad10b954599a6ad0c074645a4b36e7aa284062840b3fbedb17aa7aafd86e6b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124D8 10184 bytes
font_02_sfnt_off000147c2.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x147C2 4324 bytes

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