Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f253c044fb8a0ed…

MALICIOUS

PDF

76.8 KB Created: 2020-11-24 21:41:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 02dd48d0d8e2702ab3cc1eb74ad34237 SHA-1: c053784ab5c1d2bb7a0019c688e0a6f04e0d0b19 SHA-256: 7f253c044fb8a0ed20d57a2b26f700af69b08a39040c39ccf08965f57801be5d
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and a machine learning model, indicating it contains malicious content. It contains numerous embedded links, with at least one pointing to a known malicious redirector URL, gettraff.ru. The document body, though heavily obfuscated, appears to be related to the book title 'Artemis Fowl the Arctic Incident', suggesting a lure to disguise the malicious intent. The presence of embedded URLs and the nature of the heuristics strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gettraff.ru/123?utm_term=artemis+fowl+the+arctic+incident+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4501789/normal_5fb4257c062f2.pdfIn PDF document text
    • https://raxipufed.weebly.com/uploads/1/3/4/4/134474150/20a40ac0791a619.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/wemazun/axolotl_care_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d924e5a-f591-4b21-ab7f-78957b0db577/xulokugobovobiduwegiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6be1eff-5899-42b8-a8e6-426cd5d62da8/46673667300.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/40310304544.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f31c441-39cf-4be2-a2a3-a611000159b3/microsoft_crossword_puzzle_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/45486050236.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a315df9-b958-481a-9afd-e05e48bf5b6f/golden_sower_nominees_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43c06360-9b0a-4f9f-9768-cc120be0880c/4963611211.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/2014_mustang_v6_oil_change.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f75e152-db60-4b1a-a4d5-461329278199/xefudemabufowasonevumebe.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/campioni_del_mondo_2006_formazione.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_off0000f06f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF06F 5476 bytes
SHA-256: 03357430ef3e6c186c0b64106f0dbc046b0cd6c9e45fbac01ba08df64bc8af83
font_01_sfnt_off000102f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F6 10320 bytes
SHA-256: 287c9f7213a6a62e8bd317163ecab4bce6737b1179a6711673b16786b1f076ed

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