Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a73b3556ac19b53…

MALICIOUS

PDF

66.3 KB Created: 2020-12-22 20:40:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 1df6a349b2ec41e518022dc06ce04bb6 SHA-1: 25cc680d5b0f427024fbf9778e1217380d678cfb SHA-256: 2a73b3556ac19b53fd39ea555f38faffd553870537e8934d0f0be72f1bc37a37
96 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 as malicious by a ClamAV detection and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, likely used to host a phishing page or download a second-stage payload. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to trick the user into navigating to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffe.ru/aws?utm_term=chokher+bali+epic+full+episode PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421983/normal_5fa253196be7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378604/normal_5fdc127dc9d32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369503/normal_5f8b236444394.pdfIn PDF document text
    • https://liguroxuf.weebly.com/uploads/1/3/4/4/134443360/c45feb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/uc_browser_free_apk_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/amazing_things_on_amazon_under_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/281dcf43-890d-4b64-94ba-f72e1e736c9f/the_mysterious_adventures_of_sherlock_holmes.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfd56316f6d44b07b8b81c/t/5fc80303aab17b69737def84/1606943494787/toca_touch_trainer_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f045d9f-7f54-4482-9ba7-9c348d52c2fe/66920416520.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffb46f07-ea32-432a-af58-d0c7a7549a5a/128109692.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73e9e353-42db-4da2-817a-56e508d72e61/36663327198.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/cleburne_cafeteria_menu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4cb2600-e9f5-4d5f-a86d-67a099ba272f/south_park_nagger.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_off0000c576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC576 5352 bytes
SHA-256: c5449be5830db04b539374b162955b595b2ed1b7ccb9aceb17d34f77974adbac
font_01_sfnt_off0000d79b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD79B 10712 bytes
SHA-256: bafb5f8f5c44bcb6ff4616eef59a6b504cc2866f9d3a9cf387f413ac33f7572a

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