Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1aa2915f05d12ec…

MALICIOUS

PDF

70.1 KB Created: 2020-12-21 17:04:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6d71823b1c3fd0fd75af883768e071e SHA-1: d0b9eef8514fdec84ab3aa7638fe179f5a981b06 SHA-256: f1aa2915f05d12ec622eee9a1f9a7baaa8b6eac23352bf3c8a97b44898a5160a
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with at least two pointing to known malicious redirectors. The heuristic firings indicate this PDF is designed to redirect users to malicious infrastructure, likely for phishing or malware distribution. No scripts were extracted from this sample, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=best+ps4+pokemon+games
    • https://cdn-cms.f-static.net/uploads/4390074/normal_5fd5f07da5b52.pdf
    • https://static.s123-cdn-static.com/uploads/4460266/normal_5fcf9b7755613.pdf
    • https://cdn-cms.f-static.net/uploads/4488574/normal_5fbec1c9d5c4c.pdf
    • https://cdn-cms.f-static.net/uploads/4366313/normal_5fd64af28c681.pdf
    • https://static.s123-cdn-static.com/uploads/4486041/normal_5fdd9dde81817.pdf
    • https://feloxoxux.weebly.com/uploads/1/3/4/0/134000485/23ab42da829b9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/a971e081-9357-4d88-928c-5ab4fcee07a1/kikijejegareropexu.pdf
    • https://uploads.strikinglycdn.com/files/07e76aba-9c70-4bee-befd-dce928d02dba/13561319616.pdf
    • https://static1.squarespace.com/static/5fc65a04ab79f442f24ead5b/t/5fce3d059aa2de0c64bff5e4/1607351557894/alienware_monitor_34_inch_curved.pdf
    • https://uploads.strikinglycdn.com/files/b7f7121f-13cf-4d08-a240-caa940b5a0cf/formation_windev.pdf
    • https://uploads.strikinglycdn.com/files/15e14145-4fbe-4fef-adf1-dd5d41657169/botudogilojevojon.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd37f3dd6b265aedef2722/1606236147293/sony_3lcd_wega_engine_tv_manual.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_off0000ca22.bin
b47a966679f964365a3f2950e520c009b521641367fc1f9ee206d3e007a20b0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA22 4952 bytes
font_01_sfnt_off0000daee.bin
66fb2795cbf4dd1272abb29e32090a2ef10bc59d949d2ca534cd33f806efe9f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAEE 10344 bytes
font_02_sfnt_off0000fe30.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE30 4324 bytes

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