Malicious PDF — malware analysis report

Static analysis result for SHA-256 eabd22f8dafc5759…

MALICIOUS

PDF

76.8 KB Created: 2021-01-11 10:29:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 378ff29ea305af79cb5eb858bb5ac0f8 SHA-1: 54c107c95f5395c6cc99f14899536129d889c7a8 SHA-256: eabd22f8dafc57594a6ec0169afd0353991f69ee569decf6ac41b8b7e5b91043
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly and S3 domains, suggesting a link farm or SEO manipulation tactic. The primary external URI, 'https://traffnew.ru/aws?utm_term=cardistry+touch+uncut+sheet', is suspicious and likely leads to malicious content. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffnew.ru/aws?utm_term=cardistry+touch+uncut+sheet PDF link annotation
    • https://rurevudo.weebly.com/uploads/1/3/4/2/134265418/4612197.pdfIn PDF document text
    • https://fuwewarudizikip.weebly.com/uploads/1/3/4/6/134644733/f63ce97c276f.pdfIn PDF document text
    • https://lajutiruwogow.weebly.com/uploads/1/3/4/5/134585316/774698.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366959/normal_5f88bf66181fb.pdfIn PDF document text
    • https://jelafabonopavu.weebly.com/uploads/1/3/4/4/134443296/070196139bb.pdfIn PDF document text
    • https://zevijilutijeso.weebly.com/uploads/1/3/4/8/134850931/sogegog.pdfIn PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/lakakuseromexo.pdfIn PDF document text
    • https://site-1209810.mozfiles.com/files/1209810/29811902001.pdfIn PDF document text
    • https://site-1175273.mozfiles.com/files/1175273/rocket_car_ball_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371004/normal_5fd369313e23e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369315/normal_5f8efc3d9a20b.pdfIn PDF document text
    • https://mebijakonenu.weebly.com/uploads/1/3/4/4/134458360/8918445.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/libeganot/jurevugisepa.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/corrugated_roofing_metal_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/free_presentation_template_ai.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/37920544485.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBD6 5004 bytes
SHA-256: 016a97564fe61383b5d25313583b3c1f4a8389fd21058f58c775d66ef2ecb507
font_01_sfnt_off0000dccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCD 2932 bytes
SHA-256: bafc44bb46803766b5153577378859b202802e12e6e31a0fc280181ef88b64fc
font_02_sfnt_off0000e922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE922 10556 bytes
SHA-256: 0abc8b3ca567f6be3f9f1cf02ced1bd9a7a0c753d7a335c284deec2620403a78
font_03_sfnt_off00010d7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D7F 16968 bytes
SHA-256: 1aeebe50aee6969d2b1d368beaa6eeb52739d9125fcb2a486a192d257232042b

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