Malicious PDF — malware analysis report

Static analysis result for SHA-256 629b8e47a6940a45…

MALICIOUS

PDF

72.9 KB Created: 2021-01-03 18:01:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c63d201aefde9ae5535d369c8f373c31 SHA-1: 9edfcc29e9d8ea1322c4d7ed6a158b18894b3b73 SHA-256: 629b8e47a6940a452495816a362fa0171bca451ba457687b0cc9016cc67bfca4
214 Risk Score

Malware Insights

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

The sample is a PDF file flagged as malicious by multiple heuristics, including a critical finding for a redirector link. The embedded URL points to a known malicious redirector, suggesting an attempt to lead the user to a malicious site. The PDF also contains a link farm, further indicating malicious intent. No scripts were extracted, but the PDF structure itself contains malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://traffine.ru/123?utm_term=moen+bathtub+faucet+cartridge In PDF document text
    • https://cdn.sqhk.co/sevafeluba/kjgboic/33958862335.pdfIn PDF document text
    • https://rigozanukamesok.weebly.com/uploads/1/3/4/5/134508669/5639516.pdfIn PDF document text
    • https://tipirigemiwar.weebly.com/uploads/1/3/4/0/134016889/kanaduzatol_kerupexogebiwuv.pdfIn PDF document text
    • https://wovipoxutoluku.weebly.com/uploads/1/3/1/3/131383624/razunuz.pdfIn PDF document text
    • https://cdn.sqhk.co/rularijulen/chgpgFb/litagododaza.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/fizaxo/tuxagulevu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97d0454f-9e3b-4c82-b25f-d5fbc3cdcb36/76158530742.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d632fbca-2dc8-4330-b091-024879039afd/how_to_get_a_cat_in_minecraft_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a7a3579-9ca6-4fab-b75e-9f16d14f153f/6830779117.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/386278ff-6d8a-4b9e-8392-05be24d1e949/datanavusadixixiter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f21ad6eb-82c5-4d69-901c-edb11bac055c/99125231049.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a168c583-13ff-4bf4-b18a-f94faf2a6390/calories_jersey_mikes_turkey_sub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed81b633-bfc4-433b-acc7-d61cecbe7c36/ccac_conference_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36cfd7e9-3117-4be2-bab5-51e7faa2b65f/mens_fur_hats_montreal.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE109 5220 bytes
SHA-256: ad1891e3c1d544233a465fe9cfad19ea9f1375b6b20254021d487504f960b8d1
font_01_sfnt_off0000f2d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D5 10728 bytes
SHA-256: 66c945975100478b6925b2516912c57bb16f6eacd0ddc3c5999844c495204c1a

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