Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a76c56bc7e5315f…

MALICIOUS

PDF

71.3 KB Created: 2020-12-19 11:59:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc1685f0ef0310c2a30d74f3976edef2 SHA-1: 11b33cdaa57422e830fa962ffe2fcda5d18b2962 SHA-256: 6a76c56bc7e5315fd0ae65bc1bea735b2fb444fe76e36646460bb1cd295e086d
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO spam or phishing. The primary URL, 'https://traffking.ru/strik?utm_term=jbl+computer+speakers+price', suggests a lure related to product searches. ClamAV and ML classifiers strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=jbl+computer+speakers+price
    • https://daniwevuwawudo.weebly.com/uploads/1/3/4/8/134849628/xenejon.pdf
    • https://vikumeniwexawud.weebly.com/uploads/1/3/0/9/130969440/rezukiwamid.pdf
    • https://vozexipazaxa.weebly.com/uploads/1/3/4/4/134444785/6ce586fd737.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/gurowozenupifi/94240330550.pdf
    • https://s3.amazonaws.com/livivuvuwugeb/laduzogisafenikeru.pdf
    • https://s3.amazonaws.com/tabobujimo/rupigizatijaxukatow.pdf
    • https://s3.amazonaws.com/bovenotojitowe/chola_dynasty_temples_information.pdf
    • https://static1.squarespace.com/static/5fce34e9790d063a90a99d52/t/5fd5fdcfc4373837b90079ff/1607859665506/aitsl_standards_leaders.pdf
    • https://uploads.strikinglycdn.com/files/ea5e4078-56ef-4d6f-b856-c904ee0d17f3/gabriels_oboe_piano_sheet_music_free_download.pdf
    • https://s3.amazonaws.com/jipowumat/73575195079.pdf
    • https://static1.squarespace.com/static/5fc55b0692c50b1a1e951dba/t/5fce9bb8386eee3f51504629/1607375801342/samsung_family_hub_counter_depth_4_door.pdf
    • https://uploads.strikinglycdn.com/files/af984f3c-9221-4f4b-b1c0-323b4bd229bc/snake_goddess_from_knossos.pdf
    • https://s3.amazonaws.com/xunilukegez/pifibaxi.pdf
    • https://s3.amazonaws.com/xupizewuxere/girajadelibe.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbf8.bin
4e8a63f9980e49b157767fe6375a4588b385db6daa8043c3166e618e1ef51f86		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF8 5048 bytes
font_01_sfnt_off0000dd22.bin
b0abe0d84ada20253d1509f500094257da72b145eff0929877d54726b1537f76		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD22 10900 bytes
font_02_sfnt_off00010272.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10272 4324 bytes

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