Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc2327e921491e9e…

MALICIOUS

PDF

81.9 KB Created: 2021-04-15 03:59:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b0f37d091c16ed38b8ecc1df0237b7fe SHA-1: 2435e9d8a8dd4e208c052883a11a2b22e15c1918 SHA-256: cc2327e921491e9ed24108be308d3e39bffe2bc45ec6c52c4ef2c7e87ed4f6bf
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent example being 'https://botokaw.ru/strik?utm_term=the+importance+of+being+earnest+ernest+cline'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed as a link farm on disposable hosting, further supporting a phishing or malware distribution intent. Although no scripts were explicitly extracted, the nature of the embedded URLs and the detection signatures suggest it likely attempts to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://botokaw.ru/strik?utm_term=the+importance+of+being+earnest+ernest+cline PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476757/normal_602efbc579ad7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500429/normal_604ce8620cf7b.pdfIn PDF document text
    • http://sun-italy.space/fowodimovuvugokunofuwuke0sfnn.pdfIn PDF document text
    • https://xuredetinumimo.weebly.com/uploads/1/3/4/6/134630251/71a8ae79148ad0e.pdfIn PDF document text
    • https://solezoxi.weebly.com/uploads/1/3/4/6/134654925/duroza.pdfIn PDF document text
    • https://gixunilaw.weebly.com/uploads/1/3/1/8/131856646/cb7a7759d2b9db8.pdfIn PDF document text
    • http://lolkek.xyz/how_long_does_wahl_clippers_take_to_charge88hiz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501963/normal_6030cbeb351f1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418167/normal_5fca75af0829c.pdfIn PDF document text
    • http://nout-prokat.website/jisiroxixiditomikegub93jo9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479214/normal_5fde4bdeea2f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465387/normal_604e77629d296.pdfIn PDF document text
    • http://dmgameplan.com/bahome_botal_dj_remixuodbj.pdfIn PDF document text
    • http://klyshsheff.xyz/68332670164rd9xc.pdfIn PDF document text
    • http://com-servers.online/lexajoxetatag2hfd9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392442/normal_603e0b8e9ff66.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/87f0fdef-6481-483c-ae42-bbb779524e9e/lamaxavakigufogetarojo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/256fcd4b-ab92-4211-83de-827a8c138640/what_is_the_least_livable_city_in_the_world.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/988228aa-2b82-49d3-ada6-ba6a3eeb3b4f/nikon_p_223_3x32_scope_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d93fa982-6d03-4254-8f13-40385991e483/42625567118.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10037 5516 bytes
SHA-256: c54740c7814a81da07bd6dc44b8915220ebf5b60d5fe8ad8b443b11078a38332
font_01_sfnt_off000112ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112CA 11612 bytes
SHA-256: 2f7534e87839c17c70647f4e8067ab6600bc877e2e8a2606931cf1f0a32dbd71

Open this report in the interactive analyzer, or submit your own file for analysis.