Malicious PDF — malware analysis report

Static analysis result for SHA-256 cea45caef4c6dc5b…

MALICIOUS

PDF

159.2 KB Created: 2021-01-02 14:16:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 4c4d00406b7c07fbb2b97eb1ff20023b SHA-1: ee029a0d50950d9f510e2a65d03015d4c6c13c76 SHA-256: cea45caef4c6dc5bebe44a4ed32b42695145cb01a6314ce6de5279870df53988
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a link to known malicious redirector infrastructure, traffking.ru, which is a strong indicator of phishing or malware distribution. The ML classifier also flagged this PDF with high confidence. While no scripts were extracted, the presence of a malicious redirector URL suggests the document is designed to lure users to a compromised site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=android+imagebutton+set+background+color+transparent In PDF document text
    • https://cdn.sqhk.co/zisubiziwu/jghihlm/marcianito_meme_meme_sound_button.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502436/normal_5feb1830be8a6.pdfIn PDF document text
    • https://cdn.sqhk.co/vagewovupug/gBhbHgf/samsung_imei_calculator_online.pdfIn PDF document text
    • https://cdn.sqhk.co/buwowunuras/Tv1g5X1/dundee_stars_ice_hockey_merchandise.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366336/normal_5f872387f1399.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482402/normal_5fc9410b8dbeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475194/normal_5fea37f48d62e.pdfIn PDF document text
    • https://cdn.sqhk.co/duwewofowus/Ajajajh/jozemak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402244/normal_5fa166e4c406d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386851/normal_5fcddc1520b99.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://uploads.strikinglycdn.com/files/13500155-496b-420c-aa4c-3e41a16a33b7/45067731735.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromisixinolib/agricultural_biometry.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/telilud.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000224bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x224BB 5468 bytes
SHA-256: 94aceb83ba7c490b09f480ed4bdfe2944a8e8a2154e3c05365d881f3ddb9c7b2
font_01_sfnt_off00023735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23735 12984 bytes
SHA-256: 3ab8156cecd1734e219e1ab7dddb5c32807d7be65b2c52bdc86cdf5bb86e0da6
font_02_sfnt_off000260c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x260C5 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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