Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc943cd1abdefb4f…

MALICIOUS

PDF

83.0 KB Created: 2020-12-25 05:43:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 6fafbc419c4e669cc0247c1aa445f884 SHA-1: 1b0a54b4c4108c3ab84790abd8d1120308daaa25 SHA-256: dc943cd1abdefb4f42620194397386ad3f97ad14a41091bb832c92fda33c70b5
222 Risk Score

Malware Insights

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

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link to known malicious infrastructure and a link farm designed for SEO manipulation. The ML classifier also strongly indicated maliciousness. The document's purpose appears to be directing users to potentially harmful websites, likely for phishing or malware distribution, as suggested by the critical PDF_MALICIOUS_REDIRECTOR_LINK heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ggtraff.ru/123?utm_term=christian+medical+mission+trips+for+nurses In PDF document text
    • https://tabupuja.weebly.com/uploads/1/3/4/6/134647436/0251425ca6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383922/normal_5fb3d54e1278e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448743/normal_5fdf85e5a4b80.pdfIn PDF document text
    • https://cdn.sqhk.co/vizinifum/2ghdgkS/64685971071.pdfIn 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://uploads.strikinglycdn.com/files/28bb48b1-e627-418a-9ce8-0bfc9ab83d0f/anima_beyond_fantasy_character_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/disco_inferno_the_trammps_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a085360b-50c2-40a9-a308-46449765d118/kadadapogemotasajum.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/xosuzuxasikepofaju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73a16bea-e5f4-4b0e-876e-9eb6063e083a/15659755708.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/69021143770.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/dupont_viton_chemical_resistance_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/zalevufogoduvitelupefufo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d579b24e-a782-48b4-be56-04a5f1d84435/2002_honda_civic_repair_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ef51043-2674-40af-8e7a-3e763766ad53/fafulidujibowefezokapale.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_off0000f9cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CF 5300 bytes
SHA-256: 3f20f4a4e70cd00b9e00d6fbd9311ed8293bedae6c45bfc7309dd512275f6468
font_01_sfnt_off00010ba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA3 10920 bytes
SHA-256: 2da621af9f6ccbee55671938e7f30cca22f7ac2b3c9716f406bb308c45f54272
font_02_sfnt_off000130ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130CA 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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