Malicious PDF — malware analysis report

Static analysis result for SHA-256 078505da28d5fe61…

MALICIOUS

PDF

70.5 KB Created: 2021-01-11 15:33:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 045742fca9cb992935cec779b08b7e1b SHA-1: 9b0d79dd0f5fbd3b773ca646cdba4a7c56e2a2ca SHA-256: 078505da28d5fe61f23cc72584f3983d4bebbe77e3ea043411f9388936eeee66
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains multiple links that redirect to known malicious infrastructure, specifically a link farm designed for SEO poisoning. The primary redirector URL is https://traffking.ru/aws?utm_term=xforce+autocad+2014+64+bit+free, which is likely used to lure victims with promises of free software downloads. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/aws?utm_term=xforce+autocad+2014+64+bit+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4476927/normal_5fab74523fdcb.pdfIn PDF document text
    • https://cdn.sqhk.co/nupegefozub/p4ihTjf/super_skill_pinball_4-_cade_release_date.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393019/normal_5ff13a82cdfdc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414677/normal_5fef50541b29f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421360/normal_5fec11cfd5525.pdfIn PDF document text
    • https://fewidatemuvej.weebly.com/uploads/1/3/4/2/134266352/majukegoke-jupupuvodideku-konegin.pdfIn PDF document text
    • https://wasatetokis.weebly.com/uploads/1/3/4/5/134513062/683418.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426416/normal_5ffa4490e5561.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422637/normal_5fb30b4acb555.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377704/normal_5f8cbdfd1f4a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421478/normal_5fe72fab6e441.pdfIn PDF document text
    • https://cdn.sqhk.co/jumifokujuje/hjMhjAX/94671004667.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/muvazi/14816187634.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/44900198377.pdfIn PDF document text
    • https://s3.amazonaws.com/wutisigila/72848779171.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD670 5488 bytes
SHA-256: edefa3a2b1aeff5fc0ceec17bafe394db2cbfc87519b0b932e2bbd06fb5350d9
font_01_sfnt_off0000e92e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92E 10652 bytes
SHA-256: 897dd0849b288bacfbb0d031054c6962fd316d851178ca2f8e198c9cb6fc4007

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