Malicious PDF — malware analysis report

Static analysis result for SHA-256 472cb890523ca1f6…

MALICIOUS

PDF

74.4 KB Created: 2020-11-14 03:57:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f31e14253859079259de9a2a22048e63 SHA-1: 774397e7a943c41dafd5866fab1ada42b6ff2990 SHA-256: 472cb890523ca1f6eea34391d81d375a19b2906e41f5811432ac113f8cd03882
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file is identified as malicious by ML classifiers and ClamAV, and it contains heuristics indicating it is a link farm and an advance-fee scam lure. The document body, though heavily obfuscated, suggests a lure related to a 'joint custody calendar template'. The presence of numerous external links, including one to 'trafffi.ru', indicates an attempt to direct the user to malicious content, likely to facilitate further stages of the attack or scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/aws?utm_term=joint+custody+calendar+template
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/rotesojelunemiroto.pdf
    • https://lodobimamavudug.weebly.com/uploads/1/3/4/3/134306091/4718287.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/titugome/hunter_s_thompson_hell_s_angels.pdf
    • https://uploads.strikinglycdn.com/files/6a51e758-4a99-4f30-b7da-bd7a65c40e90/jutet.pdf
    • https://uploads.strikinglycdn.com/files/9088cd76-63a5-4382-8211-201e7d103424/montgomery_ward_catalog_1895.pdf
    • https://uploads.strikinglycdn.com/files/d5be8171-4ef6-4e06-b702-05ef00cc959c/xetezinaj.pdf
    • https://uploads.strikinglycdn.com/files/bf4735a7-a984-469f-9f00-af9e93dfa86a/menzil_ilahisi_indir.pdf
    • https://uploads.strikinglycdn.com/files/1eabb85d-1975-4ba7-bff4-8323496b0259/70365943314.pdf
    • https://uploads.strikinglycdn.com/files/8d0c94ea-11c6-46d5-bc8f-bfcf7eaf93d2/infant_optics_dxr-8_video_baby_monitor_troubleshooting.pdf
    • https://uploads.strikinglycdn.com/files/17326599-e6f7-4d69-8239-92cc799a1f97/conquistador_maynard_ferguson_sheet_music.pdf
    • https://s3.amazonaws.com/vikukinumet/3099553347.pdf
    • https://s3.amazonaws.com/regegozumekoza/dnd_5e_bullywug_stats.pdf
    • https://uploads.strikinglycdn.com/files/0be3db78-58ff-4d15-bc39-f3fa9ae2bde4/gisejezaxakaxiretibimu.pdf
    • https://s3.amazonaws.com/baxekojojexusol/death_on_two_legs_lyrics_meaning.pdf
    • https://s3.amazonaws.com/defipedibe/swtor_jedi_sentinel_guide_6.0.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7f9.bin
a12005c80fc762ade722a3f8dde8de196418100c2d943455c935d3a2282e5dca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F9 5192 bytes
font_01_sfnt_off0000e98d.bin
61385acc515eae6987bb84fbaaa77b66850891c7995be2020de21003421499cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE98D 10732 bytes
font_02_sfnt_off00010e0e.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E0E 4324 bytes

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