Malicious PDF — malware analysis report

Static analysis result for SHA-256 efa91e044f2d6428…

MALICIOUS

PDF

66.9 KB Created: 2020-11-14 11:15:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 89c991a4f5bc7ff5d2d3544d8f91b322 SHA-1: 6dad67b109e72922a54c68938d3f54113aa8c11e SHA-256: efa91e044f2d64286b2e730cc0668384f637485b629019ea803059d3b3386445
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://cctraff.ru/123?utm_term=arbonne+strawberry+protein+recipes In 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
    • https://s3.amazonaws.com/faluzotixupi/91096599415.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/70096489380.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a74ec2f-d328-4fbc-b0b7-55b3dba74fac/zasilidemeled.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/17554813365.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f53ff955-2e7d-42df-b3b7-f91cc79df5f8/honeywell_smart_thermostat_rth9580wf_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/guvepisolarozibixom.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/mariage_d_amour_chopin_spartito_pianoforte.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3110ab82-a556-46cc-9d22-fe221243277a/wawisapozipikedulutadofis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81955631-acfc-48f8-8fee-03f134ce5cd7/tafira.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/setelukebedapagavamivel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c996f09-faad-4624-b31b-79977757ab4a/xaridigajememovoxureju.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_off0000bc72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC72 5008 bytes
SHA-256: b0fa3ac08c9ea47d228f5b34be6db2b6275e212096c547592629f8fe2985faf3
font_01_sfnt_off0000cd8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD8A 10372 bytes
SHA-256: fc5d1d1ac239d023d1d8be3d4cd7dc19ead715bb2c59c0c89773f5e8a377f506
font_02_sfnt_off0000f11b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11B 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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