Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cf360f87fc1b630…

MALICIOUS

PDF

78.9 KB Created: 2021-03-25 17:32:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 25e06957e42b6025263179bcca2a55c3 SHA-1: ee98c7d7c74cc762c00015cbaa76cbaa9170c3e2 SHA-256: 2cf360f87fc1b630eaf1acd63cec7d5c370b333b426fce1c8f942b2a088a7cd8
222 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to suspicious domains, indicating a link farm or phishing attempt. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though malformed, contains text related to donation receipts, suggesting a lure to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://crophysi.ru/strik?utm_term=does+the+salvation+army+give+receipts+for+donations In PDF document text
    • http://avit0.pro/alcatel_omnipcx_enterprise_datasheetq0btl.pdfIn PDF document text
    • http://reflectionss.space/18003369017du1eh.pdfIn PDF document text
    • http://euromarket.pro/godopidivonetatimizafete6qube.pdfIn PDF document text
    • http://fumigatoff.online/automatic_differentiation_techniques_and_applicationsij5px.pdfIn PDF document text
    • http://ginizamiterog.22web.org/revifetupuxudakemufotu.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/fb4d0bef-f8b0-4aee-9471-2f0a5c031b8b/panasonic_dect_6.0_expandable_cordless_phone_with_answering_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8aacb24c-442d-451c-824a-bdb42938d353/sat_exam_november_2017_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/consumer_reports_cars_used.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/dragon_s_crown_pro_ps4_trophy_guide.pdfIn PDF document text
    • https://4c80ca50-31de-4e6f-b265-471620011c4a.filesusr.com/ugd/08c6b7_47af96ba81d149438c6f87676ef98c8c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/where_can_i_fix_my_powerbeats_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6efd970-e627-4273-b402-bab10619fd4f/honda_2000_watt_generator_price_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/94721702962.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/29633436486.pdfIn PDF document text
    • http://zegegapo.rf.gd/what_can_i_descale_my_keurig_with.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d17035b4-ff2a-4341-b22e-53a068cdb0db/63588050772.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1ef2d1e-ae7a-4421-8f5d-2928863a1ee7/tagekik.pdfIn PDF document text
    • https://171e2b11-24ea-4535-acac-f971ec821c4b.filesusr.com/ugd/a07927_3eecd8104a7e4994ace1ee602e527151.pdf?index=trueIn 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_off0000f39d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF39D 5728 bytes
SHA-256: 33d12d1e8d1d20a409872b482f73b786d46922fc4ca9e1a69620655cc4615620
font_01_sfnt_off0001070b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1070B 11556 bytes
SHA-256: 664d99d10b35e23c2e974202b478a2b6e302e352f72413bd8d1723a955830be1

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