Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b8e2a6eabb68f3e…

MALICIOUS

PDF

75.7 KB Created: 2021-01-14 23:13:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 9737221473e2b769731c993a175b2df6 SHA-1: 93c15433a32b2aa17ca5f26a418d9d24641a5561 SHA-256: 5b8e2a6eabb68f3e59d6eb906e303c47476157cff4327bb1a03a9af925f55ad3
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying it as a link farm and another flagging a link to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the document structure itself is indicative of a malicious campaign.

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
  • 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.
  • 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=salut+d%2527+amour+sheet+music+violin In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368486/normal_5f9e121b7cb1d.pdfIn PDF document text
    • https://modisogisutoval.weebly.com/uploads/1/3/5/3/135390942/luxevexawamaratafi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447669/normal_5fc9cebf89eaa.pdfIn PDF document text
    • https://cdn.sqhk.co/bawevabob/TuG7YCG/91536479167.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426828/normal_5fa3083e220c6.pdfIn PDF document text
    • https://noxatedigijo.weebly.com/uploads/1/3/4/6/134660841/wujeno.pdfIn PDF document text
    • https://cdn.sqhk.co/bitomasijelo/fDIZvif/dijudabogalupuzo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369917/normal_5fc7ea4674c21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365628/normal_5fd61c75f10e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414486/normal_5fad6f55a51a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368949/normal_5f92c2505f2ab.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/fekife/logically_fallacious_bo_bennett_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/alkylation_and_acylation.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/soralisanakuru.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/busybox_x_pro_apk.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C7 5376 bytes
SHA-256: 78a841927744d0739cc5f73873b9ae818f8db8b155cc15a41df7eaf1c125182a
font_01_sfnt_off0000e4f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F0 11412 bytes
SHA-256: 7d8b75eef747387a2027a3d8b25644e1a0e55872df15f446a47fbf60b91e380d
font_02_sfnt_off00010b42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B42 16096 bytes
SHA-256: 61761e6c71fdd980502ce8a3a8cbf9590216241eb9eabe72fdf309a1c23cd3c2

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