Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7c7083abcadf647…

MALICIOUS

PDF

72.8 KB Created: 2021-01-08 15:34:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 07710e27bd8af7b0b3def045a8ab5364 SHA-1: 79fc56d05bd564d9ea1ac086ed43c3823c7022aa SHA-256: e7c7083abcadf64784c93385a4d88e03d37cec0cea387b07b8b39eff933f39bf
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with several pointing to known malicious redirectors and a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://ggtraff.ru/aws?utm_term=beveridge+report+bbc+bitesize In PDF document text
    • https://cdn.sqhk.co/bunewonu/heY3RKL/telecharger_galaxy_attack_alien_shooter_pour_pc.pdfIn PDF document text
    • https://xuwobonamufaguw.weebly.com/uploads/1/3/5/3/135315698/2600496.pdfIn PDF document text
    • https://wulodegekejiwa.weebly.com/uploads/1/3/4/2/134266030/tegatagafigog-laniguze-totanokofu-lazipebinulimig.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/gdsJwlv/44178188428.pdfIn PDF document text
    • https://fikazimibugexu.weebly.com/uploads/1/3/4/5/134515259/lomiwafitud-sumuzeg-disebava-kaxutuximugewo.pdfIn PDF document text
    • https://doparobisupof.weebly.com/uploads/1/3/5/3/135329684/zivakorafo.pdfIn PDF document text
    • https://ginixogigifigat.weebly.com/uploads/1/3/4/3/134367444/a3bffba5886.pdfIn PDF document text
    • https://cdn.sqhk.co/jumifokujuje/ygjgjbg/nova_launcher_android_10.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/3803c7db-4662-4a5a-af6f-346e4e798214/86008587222.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59eb134b-aa73-4433-9260-86d8b23dfada/polar_a360_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0c65fe6-124e-4c84-a2bf-a3ea97117129/nuguvawokaba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8f52def-41f6-4999-97b7-7369fd30ce3a/miami_dade_county_school_calendar_2018-19.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe9a5ac2-8805-4122-a940-b369a2807fb1/coloring_of_five_nights_books_in_order.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_off0000e0ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AC 5296 bytes
SHA-256: 3c4bd4831361cfb005398b906767f21a4b2fdc25d265e3bec4e246612418b636
font_01_sfnt_off0000f2d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D2 10364 bytes
SHA-256: 853e1175a785f90b454ad9da3896ae131f1a7afd807d6a81b9482086a10daff8

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