Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b54f22ac0c8fb17…

MALICIOUS

PDF

71.8 KB Created: 2021-01-06 16:08:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 82586a5c4e7fa0dadab84accd593b245 SHA-1: d21a2592e3ca9c498ad051b067e8d9881d56f918 SHA-256: 1b54f22ac0c8fb17e00abeab7bc9ef5d0aab8b43882d1256d566e10c73ccb5a6
214 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to known malicious infrastructure, specifically a URL associated with a redirector. The document body, though partially corrupted, suggests a lure related to gift searches, likely to trick users into clicking the malicious link. The presence of numerous external PDF links further indicates a link farm or SEO manipulation tactic to distribute malicious content.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/123?utm_term=41st+anniversary+gifts+for+parents In PDF document text
    • https://gewupokisata.weebly.com/uploads/1/3/4/6/134606569/maxeletipare.pdfIn PDF document text
    • https://gekizunelim.weebly.com/uploads/1/3/4/8/134883517/mufefekekofoxozi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e16b309-d8a4-42be-8431-866952959a7f/13586791858.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/50574705805.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/assassins_creed_2_soundtrack_mega.pdfIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/formal_dress_stores_auckland.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7fbb8f9-ba55-4746-a74c-f098e3b40286/86005840686.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d783dd7-0b84-473c-9344-84bd71974f4a/40935255728.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a924834c-711b-4b89-a6a5-c4a5db3c4867/google_chrome_recover_previous_session.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/assignment_problem_ppt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/845f029d-1db2-4b43-9cb8-1270fe0bc749/hamster_house_ideas_diy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b12206e7-0aa1-4833-9c92-c65f6833cb54/tiwixogolerebotipupovuta.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_off0000dd48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD48 5244 bytes
SHA-256: d410d5d50a17ec8b9d1b5e5ac3eebd5dca305f634efdb88b053c2f07a5f83935
font_01_sfnt_off0000ef52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF52 10284 bytes
SHA-256: b1b003c70e8f4388ec52bf0a566925ac1b79149c4d2c6ad4697f1876f61867c7

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