Malicious PDF — malware analysis report

Static analysis result for SHA-256 0489695f0ca141d4…

MALICIOUS

PDF

71.0 KB Created: 2020-12-22 14:40:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 8ff5cfb55d9e4e6af5c76fb01323696e SHA-1: e7cb7d4ca4f57f60765fcf0f1776a9c1ca6da9c2 SHA-256: 0489695f0ca141d49148bea14985dcb12211cae75b1aed29450e6793bf66d9d2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 hosting, and the document body, though obfuscated, suggests a lure related to 'lifetime channel guide spectrum'. The presence of external URIs and link farm heuristics indicates an attempt to redirect users to potentially harmful sites.

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://trafffi.ru/aws?utm_term=lifetime+channel+guide+spectrum PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381973/normal_5fb6969aa10a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383149/normal_5f8fbf497e015.pdfIn PDF document text
    • https://gikesusemu.weebly.com/uploads/1/3/4/7/134775173/xonideledizuxa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375891/normal_5f8cb2205e95a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451549/normal_5fc0fb8ab4482.pdfIn PDF document text
    • https://jabuzowe.weebly.com/uploads/1/3/4/3/134312688/mopederura.pdfIn PDF document text
    • https://rozapalevode.weebly.com/uploads/1/3/4/7/134705228/zirutevadus.pdfIn PDF document text
    • https://bozofuki.weebly.com/uploads/1/3/4/3/134322044/4e2b64f89b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495043/normal_5fd03b57c3f40.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/4ddf11f4-725e-4ae1-93f5-05c026b2d9d0/jungle_planet_nms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc8f394f-dc92-45d8-bd6a-bdc5b9de7d1d/the_pharmagellan_guide_to_biotech.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c45d7ba3-35e8-4380-b212-168ba86f4535/97357687937.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1318a5bcb0228a2845bc9/t/5fc540f8f81c9a2a0c4f0ffa/1606762744668/centroid_of_a_triangle_formula_when_sides_are_given.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_off0000d6f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F5 5508 bytes
SHA-256: 0139496d4ac5b3bf882a0f11c91c3e2fa48337f724345e5c7fde893b658d5766
font_01_sfnt_off0000e992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE992 11064 bytes
SHA-256: 506cc00b6f2510995c9667ef87fe540f055d33f4695a3ad85d0d207b700392f7

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