Malicious PDF — malware analysis report

Static analysis result for SHA-256 8488129089ba65d8…

MALICIOUS

PDF

129.9 KB Created: 2021-05-19 08:50:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: b275a3e833ceacb1744be95460b5b448 SHA-1: 4b228ed89ae3742bfa08432f6bca3a5fad87039a SHA-256: 8488129089ba65d818fa67423fc7a281bbd5651f02d4bc959f3a9db09fbef3bb
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to other PDF documents, suggesting a link farm or phishing attempt. One prominent URL, 'https://zajinet.ru/strik?utm_term=slick+tv+hack+apk+android+download', indicates a lure related to downloading an Android hacking tool. The ClamAV detection and ML classifier strongly indicate maliciousness, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • 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://zajinet.ru/strik?utm_term=slick+tv+hack+apk+android+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4393349/normal_5ffe8184c594b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491153/normal_602829ab75a92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404116/normal_603df00f5af9d.pdfIn PDF document text
    • https://nogojajefe.weebly.com/uploads/1/3/5/3/135314992/1406576.pdfIn PDF document text
    • https://rawunawikurek.weebly.com/uploads/1/3/5/9/135967659/2fc765e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368265/normal_5fe3487a96f22.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456712/normal_5fdfffa3704f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375694/normal_60591ae45828d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485434/normal_60415b689c4d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494661/normal_60049c243f625.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
    • https://s3.amazonaws.com/jujadodedaruxix/tezaroraruvejewi.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/asus_rt_n12_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/garmin_gpsmap_78_review_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/numebozomu.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/hawaii_state_id_card_lost.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/lidubiponodobo.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/48878969001.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/khaki_uniform_pants_for_toddlers.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001811b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1811B 7296 bytes
SHA-256: cba1a0fa7745a91328bf4cf03a20ce96d53057757c78ba89d82b2600c244ae77
font_01_sfnt_off0001995e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1995E 4972 bytes
SHA-256: cc0c010be44f7572bf8b0bdf7bb9bbf96ffe307c3f1f25a39c0fa4a3a251089a
font_02_sfnt_off0001aa32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AA32 13636 bytes
SHA-256: 68cbda715976a308dc0363d1de131c6a4831779604ba0fb7b208e0660867ffe0
font_03_sfnt_off0001d645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D645 16156 bytes
SHA-256: 66d67138902703cdc9273170df4cd31e682ae4a01b54ce0e9f1f1a1b5fbfdf64
font_04_sfnt_off0001eb63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EB63 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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