Malicious PDF — malware analysis report

Static analysis result for SHA-256 597bb4e6b78bb661…

MALICIOUS

PDF

76.2 KB Created: 2020-12-26 00:17:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7d6d5f8512d7b7e00b25709bc74e0fd SHA-1: 10ff69a7f7d6fc98f532f59065f476796d0b8a69 SHA-256: 597bb4e6b78bb6616e427ef0041b5b3b97977b43726d4ce3518a3aba99deeaed
282 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by multiple heuristics and ClamAV, indicating it is likely a phishing or malware delivery document. It contains numerous links to external PDFs, with at least one pointing to known malicious redirector infrastructure. The document also exhibits characteristics of a callback phishing lure and a password-protected archive handoff, suggesting a multi-stage attack. The embedded URLs and the document's structure strongly suggest an attempt to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/strik?utm_term=gallery+furniture+houston+tx+customer+service
    • https://segakimorepej.weebly.com/uploads/1/3/0/7/130738797/4521936.pdf
    • https://depatimuxuzox.weebly.com/uploads/1/3/4/4/134404048/nimud_gomiwudeviju_riritumekepo_zexizujefejit.pdf
    • https://kavosimodo.weebly.com/uploads/1/3/4/9/134901779/9273212.pdf
    • https://wugeneziwepuzi.weebly.com/uploads/1/3/4/4/134494794/jipifilimisujum_nimulibo.pdf
    • https://cdn-cms.f-static.net/uploads/4373259/normal_5f8b4b03672ca.pdf
    • https://somotudodij.weebly.com/uploads/1/3/4/6/134699902/eaad5d3.pdf
    • https://nafogoke.weebly.com/uploads/1/3/4/7/134776139/439fa45.pdf
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/3936ca.pdf
    • https://guboriratuji.weebly.com/uploads/1/3/4/2/134235556/josizozomewodel-regubibawevav-zenigi-pirinokotuv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c8050a35-776b-4306-af67-55425de61e44/fotodimido.pdf
    • https://s3.amazonaws.com/pujirageg/alm_do_materialismo_espiritual_chogyam_trungpa.pdf
    • https://s3.amazonaws.com/felasorarabipis/tamipobavuw.pdf
    • https://s3.amazonaws.com/guxosa/korawazugudigozibob.pdf
    • https://s3.amazonaws.com/lolijexejomak/72569452435.pdf
    • https://s3.amazonaws.com/henghuili-files2/zegogulasiwuzuzigejenipis.pdf
    • https://uploads.strikinglycdn.com/files/f965d902-3c1a-4a74-97d7-b1fbb5a1cdf7/derivada_implicita_ejemplos.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb6b.bin
35091ce9173b25e014d310d496f12abd49134930a4b8f06dc232bb166136d6ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6B 5380 bytes
font_01_sfnt_off0000fda2.bin
a3607abf11a07facf75782caff07eeecf73b9167e7e0aa5d793169823786b4f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA2 11184 bytes

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