Malicious PDF — malware analysis report

Static analysis result for SHA-256 37753d2444763ec9…

MALICIOUS

PDF

88.8 KB Created: 2021-05-22 19:33:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4302647a697b6d2a8ada762a23a74381 SHA-1: d7a4c4cbebbc27f9b37787553d20af96b96db4d2 SHA-256: 37753d2444763ec99fba1c2609e8c4f4b6fc83bc61429c43dd50c17f9fabdc0d
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to PDF files hosted on file-sharing services, suggesting a link farm or phishing campaign. The primary URL appears to be a lure related to DStv package channels. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious intent, likely to redirect users to malicious sites or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pelibifir.ru/strik?utm_term=what+channels+are+there+on+dstv+family+package
    • https://fikuwigo.weebly.com/uploads/1/3/1/0/131071253/5107e4.pdf
    • https://fawurefo.weebly.com/uploads/1/3/4/4/134441885/b1bd401.pdf
    • https://cdn-cms.f-static.net/uploads/4408471/normal_6069b3de935fa.pdf
    • https://cdn-cms.f-static.net/uploads/4499317/normal_60275d8976adb.pdf
    • https://jigupipugefelo.weebly.com/uploads/1/3/4/3/134387822/6113572.pdf
    • https://rabugotekinevod.weebly.com/uploads/1/3/1/8/131871666/tivonaloderazutig.pdf
    • https://rajerese.weebly.com/uploads/1/3/4/3/134387708/17862f08.pdf
    • https://tigibivimibi.weebly.com/uploads/1/3/4/3/134344299/gogufex_vosiz_poxazifarenedo.pdf
    • https://bitusuverutito.weebly.com/uploads/1/3/1/8/131871453/743f3479569e496.pdf
    • https://cdn-cms.f-static.net/uploads/4367960/normal_603fbf8f810dd.pdf
    • https://tapebosipufadiz.weebly.com/uploads/1/3/4/3/134366988/bateba.pdf
    • https://static.s123-cdn-static.com/uploads/4370285/normal_5fc5dac491a60.pdf
    • https://botuwuroxawezu.weebly.com/uploads/1/3/4/7/134713501/092e1ecfa4f68.pdf
    • https://rigugoxa.weebly.com/uploads/1/3/0/7/130776225/lavedamigij-tewepu-kanifi-sutexelil.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f7972c80-9b8a-4dfb-9a4e-b33c04702d8c/digitech_rp360_xp_review.pdf
    • https://uploads.strikinglycdn.com/files/1f6146cc-eee5-426f-8fa3-4bee00f8c177/2009_ap_language_and_composition_free_response_question_2.pdf
    • https://s3.amazonaws.com/zozofufulolig/sizimobifew.pdf
    • https://s3.amazonaws.com/vuforewebub/81568208826.pdf
    • https://uploads.strikinglycdn.com/files/9f9278c2-c77f-4ebe-be7a-9a609d3f9e15/nejatixekafipedofototu.pdf
    • https://uploads.strikinglycdn.com/files/226182be-04dd-4eb8-b892-bcfe8a985178/pomepadirokiwetipifej.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000116d6.bin
18fa5df91e562459e668dd60fa3fb6c8231e390fc01a2ff0dd883ba62b6d1960		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116D6 5808 bytes
font_01_sfnt_off00012a91.bin
c0ac4888bbcc1d10df66ae52f5d28f8d750c2d76ce1b2db8e45e8cebba6dcf8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A91 11940 bytes

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