Malicious PDF — malware analysis report

Static analysis result for SHA-256 27ce47d944dd661c…

MALICIOUS

PDF

82.0 KB Created: 2020-11-17 08:51:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 7e836450acd33d5b6c3dc56113fc2bc9 SHA-1: 15a7ae619e79a379f7c76d7c9d21e65df8db0f84 SHA-256: 27ce47d944dd661c5dc2103582246e579f7323e003ac6d8c2216c3b9fc7d4571
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary external links, 'https://traffset.ru/strik?utm_term=reacciones+irreversibles+ejemplos+vida+cotidiana', is suspicious. While no scripts were explicitly extracted, the presence of numerous external links suggests a potential for malicious redirection or content delivery, aligning with phishing or SEO abuse tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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.
  • 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://traffset.ru/strik?utm_term=reacciones+irreversibles+ejemplos+vida+cotidiana PDF link annotation
    • https://lorinifufa.weebly.com/uploads/1/3/4/3/134357706/duxokoma.pdfIn PDF document text
    • https://xataramev.weebly.com/uploads/1/3/4/3/134320843/fewuwefuvufu.pdfIn PDF document text
    • https://direnebem.weebly.com/uploads/1/3/4/6/134641367/datowiduboz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404959/normal_5fa81a821c077.pdfIn PDF document text
    • http://www.opentle.orgIn 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://s3.amazonaws.com/juvuraguvutoxif/college_acceptance_letter_sample.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67bbd612-2d7e-4022-b57c-1ed9f7b00300/wenupomomomurafow.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/18588099745.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/pekisus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aff18c1e-3b82-47c0-8cb1-23177bf6a4ad/vodixokiwesibe.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/11931176694.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/bauhaus_movement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e79977d8-dc1a-4e88-80a0-ab8fef152bde/succeeding_in_business_with_microsof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91b73bea-42bb-4cde-9bf7-7436523bb6bf/nabupetujab.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/vpn_unlimited_proxy_appvpn.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000cd86.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xCD86 12240 bytes
SHA-256: 58afda71dacd0e2ae223e8343a998f5fb5f11c55192de51d2eefd58a5e299573
font_00_sfnt_off0000bbb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBB2 5288 bytes
SHA-256: faf15be16f62d4edb5ec1ba6d06b17f0d91050c0683ab0da8a48a9b5bcc70a03
font_02_sfnt_off0000efa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA0 11400 bytes
SHA-256: 8bc38c81db35b6f7d25609d04558c3c1bd802782a1062c538dc35b0ff7c3acc1
font_03_sfnt_off00011519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11519 16080 bytes
SHA-256: 01918ab328aad74c9e8f640f01f786fd0c2e0e9f3673bd8045474dd117871356
font_04_sfnt_off000129d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129D0 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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