Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebfd41b8fd09d8b7…

MALICIOUS

PDF

76.2 KB Created: 2021-02-21 19:55:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9d94c46e03ea808104f68cf8dcfba885 SHA-1: a5188585971d162a86b1b58da0a28e5c410ac31a SHA-256: ebfd41b8fd09d8b79611d748c93e958ea89cd2c5700371fa694916936502f3c2
156 Risk Score

Malware Insights

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

The sample is a PDF that contains a large number of external links, identified as a link farm. This suggests a malicious intent, possibly for SEO manipulation or to distribute further malware. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or content distribution attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://seumenha.ru/123?utm_term=craftsman+multimeter+82140+price PDF link annotation
    • https://xefikusog.weebly.com/uploads/1/3/5/3/135390274/sezifiwis.pdfIn PDF document text
    • https://jafedemigizol.weebly.com/uploads/1/3/4/5/134588438/darisude_rinometefebunu_jefoladum.pdfIn PDF document text
    • http://wejnpowk.space/93113338309vwqiq.pdfIn PDF document text
    • https://cdn.sqhk.co/kewukapugino/hhjib3M/can_i_learn_to_sing_opera.pdfIn PDF document text
    • https://siwevamad.weebly.com/uploads/1/3/1/8/131871433/7069214.pdfIn PDF document text
    • https://mabunamu.weebly.com/uploads/1/3/4/9/134902385/xezipewunaxitiligu.pdfIn PDF document text
    • http://reduslim-shopofficial.site/mixubria1z.pdfIn PDF document text
    • https://sezebotari.weebly.com/uploads/1/3/1/6/131636698/fekeje.pdfIn PDF document text
    • https://mevavenepid.weebly.com/uploads/1/3/1/6/131637679/4745078.pdfIn PDF document text
    • https://sitegevom.weebly.com/uploads/1/3/4/6/134664280/6e72fda.pdfIn PDF document text
    • http://zabavnyi-slon.ru/gapiwuzereguxu5m26g.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/nedijowewoded/theological_studies.pdfIn PDF document text
    • https://s3.amazonaws.com/jugobimuraje/82841091840.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/ayers_rock_facts_and_information.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/22938823503.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_off0000e77f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77F 5676 bytes
SHA-256: 452bf67ded2e624c7e419c5f3bc2099d9977ffed82e13903814e2639f245d470
font_01_sfnt_off0000fab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB9 12116 bytes
SHA-256: 1ccf23fab4fdc8b810fc2c815939ba7cf213f50b38f766906195d540d3954e85

Open this report in the interactive analyzer, or submit your own file for analysis.