Malicious PDF — malware analysis report

Static analysis result for SHA-256 180c1ddff8953f8b…

MALICIOUS

PDF

72.5 KB Created: 2021-05-16 13:21:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: d43a89ddb7628662a942158ab6021876 SHA-1: 8c73d1eaa23cd56a5d9bdca54c07a78048566563 SHA-256: 180c1ddff8953f8b1cdf30e9dda50c36c3b041ee60d71efaac9758015d2a550a
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, potentially leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://lozipotod.ru/strik?utm_term=how+to+share+live+location+iphone PDF link annotation
    • http://eduha.online/kiwosezolumguxr.pdfIn PDF document text
    • https://jepopiravu.weebly.com/uploads/1/3/4/1/134131497/6181449.pdfIn PDF document text
    • http://nashremont.site/retro_nes_emulator_descargar_apk00g57.pdfIn PDF document text
    • http://bosnoslovnoejelaniekupit.xyz/25530500165bq19l.pdfIn PDF document text
    • http://habercigo.com/60189782774a1l91.pdfIn PDF document text
    • https://wivepeweg.weebly.com/uploads/1/3/1/4/131455463/9277097.pdfIn PDF document text
    • https://rozozejowetape.weebly.com/uploads/1/3/4/5/134510424/2001769.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4cd5a77a-be8d-44ba-8952-4177873115c4.filesusr.com/ugd/930050_9b62744383be4ec4886f85e9abc14379.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7be945f2-74b4-4045-9056-89fc854434d3/how_to_replace_the_battery_in_a_2017_toyota_corolla_key_fob.pdfIn PDF document text
    • http://zunimesigo.rf.gd/ielts_academic_reading_passage_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/icewind_dale_enhanced_edition_quest.pdfIn PDF document text
    • https://6cf80756-66c2-4d2e-b15d-ff1677cb7115.filesusr.com/ugd/2257e8_830940ecdedd4e1fbfa14b117354ad4c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7c641b2-f6e5-42a1-a2b9-0b9aa6afcada/tirutozetilamefozezozi.pdfIn PDF document text
    • http://gigitepusiligo.epizy.com/archival_research_methods.pdfIn PDF document text
    • https://d90bda3b-35dd-409f-9d4b-b4a00d881a52.filesusr.com/ugd/b88e3d_bdedb0d422bc43f2bbebe944092f3504.pdf?index=trueIn PDF document text
    • https://f7f2eb1f-4ce6-40bf-b337-6bcc2c9c1a95.filesusr.com/ugd/dc6899_8066c137d8a64b7ea639d2190aedd9f7.pdf?index=trueIn PDF document text
    • http://nikofutame.rf.gd/ihss_electronic_timesheet_help_desk.pdfIn PDF document text
    • https://98748e4b-3258-471a-903e-8ea98415cca0.filesusr.com/ugd/fd7405_354b0acb82ca4177ac72b3af5d88f5d9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/death_note_light_up_the_new_world_streaming_ita.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_off0000def2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF2 5132 bytes
SHA-256: 6328e7ded85fa3208b00a8c3396195d1b7dd5556a4ce066237929a90bef7467c
font_01_sfnt_off0000f078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF078 10644 bytes
SHA-256: 5fd8a04eca9c99bfbedacaaa82fac0e0b7cf2dd1dbd0b8d72c3563c7dd40216b