Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fc012bc36929731…

MALICIOUS

PDF

69.7 KB Created: 2021-01-11 21:44:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: aeb15a6f7cf04ee501df0244a308d7d9 SHA-1: 79accc334a847495e2b227aaebb2b3350b35b551 SHA-256: 5fc012bc369297318c70a69e6bc4177c7f39671707f77638b0bfc18c0eef37a6
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, with one prominent URL pointing to 'traffking.ru'. This suggests a phishing or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing unwanted content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://traffking.ru/123?utm_term=photo+layers+superimpose+apk+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4474977/normal_5fb6ef69a90d9.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/bf7a667f00e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387918/normal_5f907018f0c6a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461216/normal_5fe28a46bd489.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483081/normal_5fd7eac48a58b.pdfIn PDF document text
    • https://jopegivev.weebly.com/uploads/1/3/4/2/134234712/c0696f1abf8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492880/normal_5fb57a7ef283d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450046/normal_5ff0ba3e91360.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456671/normal_5fda386e75829.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/wibedubosateg/blackmart_old_version_apk_uptodown.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/mcafee_antivirus_online_installer_free.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/79077063011.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/5481303161.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/bhaigiri_marathi_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/datepicker_format_dd_mm_yyyy_swift.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/wolaleri.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC13 2952 bytes
SHA-256: c2f56268a566df113ea8d29fca174347cb93d232f4171da6c777a0030a56deed
font_01_sfnt_off0000c69c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC69C 5340 bytes
SHA-256: c7e3bce62364ae35362968b5209dafdd3dd9920a173e26f8379b76690462238c
font_02_sfnt_off0000d8ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8AE 10072 bytes
SHA-256: 8c7dcb44a22a865a3de0e074a7fe2db6fd5d2918d104bd27a85c24d45d68d30b
font_03_sfnt_off0000fb23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB23 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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