Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2c5105ee394e642…

MALICIOUS

PDF

95.2 KB Created: 2021-01-17 14:29:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 1bdbcd5cec2e1c32bfdd159589dda970 SHA-1: c1b3dd5d76650a83e6286c9ba10c4105caee92ef SHA-256: e2c5105ee394e6427a111b0a2bd619a9992bf72f659d1804d7b4fdf992cf08f9
184 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical alert for linking to known malicious redirector infrastructure. The document body, though heavily obfuscated, suggests a lure related to financial reports. The presence of numerous links, many hosted on disposable domains, indicates a link farm designed to obscure the ultimate destination, which is likely malicious.

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 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.
  • 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/aws?utm_term=monthly+financial+management+report+sample In PDF document text
    • https://site-1241850.mozfiles.com/files/1241850/kaboz.pdfIn PDF document text
    • https://site-1176552.mozfiles.com/files/1176552/dama_italiana_online_2_giocatori.pdfIn PDF document text
    • https://fagozozefixus.weebly.com/uploads/1/3/4/8/134846406/bisusodenewez.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/0fb35f9.pdfIn PDF document text
    • https://site-1174183.mozfiles.com/files/1174183/zatirutozel.pdfIn PDF document text
    • https://site-1172602.mozfiles.com/files/1172602/gogupafuduliwal.pdfIn PDF document text
    • https://site-1171925.mozfiles.com/files/1171925/bulotegedozo.pdfIn PDF document text
    • https://site-1177236.mozfiles.com/files/1177236/jenedenusugejagogodor.pdfIn PDF document text
    • https://site-1201322.mozfiles.com/files/1201322/5782116293.pdfIn PDF document text
    • https://site-1249530.mozfiles.com/files/1249530/55162320331.pdfIn PDF document text
    • http://zobebukore.22web.org/firefox_browser_47._0._1.pdfIn PDF document text
    • https://site-1174542.mozfiles.com/files/1174542/hotstar_cracked_apk_2019.pdfIn PDF document text
    • https://zoxetojasag.weebly.com/uploads/1/3/1/4/131437223/ef232c275e94.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://tujulerika.epizy.com/mastering_physics_homework_3_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sirasu/57080046961.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/lizixuvanumonilevokase.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/jakubovijudukekixuxikuvab.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000128d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128D3 5324 bytes
SHA-256: 39841ec13f576d037cfc7fc0c6ae7eef455d9bc4a34eb27970f33fd90a1c5505
font_01_sfnt_off00013ac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AC4 11248 bytes
SHA-256: ddfe1804b8316e5448ac9c04983a684d0f2c905f6b8704c5c1af261bcff298ee
font_02_sfnt_off00016113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16113 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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