Malicious PDF — malware analysis report

Static analysis result for SHA-256 29371b7ccc98ef7c…

MALICIOUS

PDF

73.6 KB Created: 2021-03-30 21:01:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5c6723751fc6cfd0af596c5e9f44f2f6 SHA-1: d59054d6abdf6c7f6023a1659e7fd20d6bfc7800 SHA-256: 29371b7ccc98ef7c0f8d46d1ee54a87e57920b9d8e6fd04c3feae9a744785b91
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to potentially harmful sites. The presence of external URIs and the 'link farm' heuristic strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://fokemale.ru/strik?utm_term=chief+gunner%2527s+mate+navy+salary PDF link annotation
    • http://vittorguxx.site/82858150036nnzy1.pdfIn PDF document text
    • http://papewakoj.22web.org/java_aptitude_questions_and_answers_with_explanation.pdfIn PDF document text
    • http://opros.xyz/bufimr5k9b.pdfIn PDF document text
    • http://sandiego-podcasts.com/network_technician_job_description5tfu1.pdfIn PDF document text
    • http://idealica-co.site/toxopamdte7c.pdfIn PDF document text
    • http://vifofumimugeke.22web.org/56143133184.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://giwibuwasiwa.rf.gd/equidad_vs_igualdad.pdfIn PDF document text
    • http://vazorilumi.epizy.com/dream_girl_movie_online_free.pdfIn PDF document text
    • http://nuzuxomobepofe.rf.gd/pojotulit.pdfIn PDF document text
    • https://305aa2e3-e1d2-413d-aa2e-f1bb83d03ded.filesusr.com/ugd/92ee2b_2785b34055e1418199082f524c9f3165.pdf?index=trueIn PDF document text
    • https://667abc8f-92ca-45d9-bc9d-789c80a68858.filesusr.com/ugd/dcd78f_3b3602d580364f9ea0f846cf33c406f5.pdf?index=trueIn PDF document text
    • https://631ffb88-cf2d-4844-8d6b-9338a1b21cc5.filesusr.com/ugd/d24e6f_e052c1a3fe95490baf56581a935247c6.pdf?index=trueIn PDF document text
    • http://pimuxexud.epizy.com/icivics_tribal_government_answer_key.pdfIn PDF document text
    • http://xapimiwosusuv.epizy.com/maya_wrap_deformer_paint_weight.pdfIn PDF document text
    • https://63dbeab4-18c6-4677-a808-17cd77aec119.filesusr.com/ugd/963d80_b4ceffec3898418db080c59862e82369.pdf?index=trueIn PDF document text
    • https://3b87a2b8-2d13-4e6d-acc4-cbba57692a59.filesusr.com/ugd/50988c_4b644b3aad6b4c0ba659f1cce9396f77.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/96652511598.pdfIn PDF document text
    • https://78fa80b2-8629-447b-ad63-53e91e8d4948.filesusr.com/ugd/8f02de_f9ea9ad3834f4f98a9ef839bcdfeb79e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/alpine_ina-w900e_price.pdfIn PDF document text
    • http://dupetomumipur.rf.gd/classification_of_antibiotics_download.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_off0000e183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE183 5284 bytes
SHA-256: a9f36a7e5def1b16ddc43b73eef124062616306960a790fad0db3853d45aeab1
font_01_sfnt_off0000f365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF365 11108 bytes
SHA-256: 6990c91ea63ef12db745d863e041e2b6b1c92da75c61df59673b51ea9ddb577d

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