Malicious PDF — malware analysis report

Static analysis result for SHA-256 7184095b584201c9…

MALICIOUS

PDF

122.4 KB Created: 2021-01-11 15:47:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 208a85b941031597a3f59b3fba08733b SHA-1: 8f53758259a122fa75b6ef30919646917cc44998 SHA-256: 7184095b584201c977f0c9de2fb94d0f7dbb18d8036483be21819a2a844b3eb7
222 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a large number of embedded links, including a critical redirector link to 'traffmen.ru', suggesting it's part of a link farm designed to distribute malware or lead to phishing sites. The presence of a 'Download Button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffmen.ru/aws?utm_term=borderlands+2+randomizer+reborn In PDF document text
    • https://cdn.sqhk.co/kusewupudin/7RgjhdJ/alien_shooter_app_guide.pdfIn PDF document text
    • https://site-1176039.mozfiles.com/files/1176039/donde_pagar_mi_internet_en_casa_telcel.pdfIn PDF document text
    • https://cdn.sqhk.co/mulepava/Jgijigj/kinekepinakerugagud.pdfIn PDF document text
    • https://wesoxiworikezux.weebly.com/uploads/1/3/1/3/131380467/5477409.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421637/normal_5fd64cb4c8730.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388619/normal_5ff190dcb8f71.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/dibedamoka/long_ju_mit.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/52562891328.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/coordinate_geometry_area_and_perimeter_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/ableton_live_7_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/wokenokivofe.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/emotional_first_aid.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001acb3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1ACB3 26768 bytes
SHA-256: c8a076ac2c2bf7b5e2b7b08ad732d8c60101ef2052c5cab458a9c89ec1b97efe
font_00_sfnt_off000174b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174B8 5340 bytes
SHA-256: 7154909b05799054c1774c0e3ffaa066ac26f919ee78f3ebe23526592be2cc0c
font_01_sfnt_off000186ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x186CE 11160 bytes
SHA-256: 67461c2f6a90cc94868e67ac0412256c7914ea0370e31bf5223b3132d22a2277

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