Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7e9e48ad7e305ca…

MALICIOUS

PDF

78.2 KB Created: 2021-03-17 03:48:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd0784edbadf504e5ab996e2013fd1c4 SHA-1: 980235033f9312ee646fc6069db32857f0b79f07 SHA-256: f7e9e48ad7e305caca2cb41c8542cc3d6b92e6712ad864d37f37383ae1edbc98
156 Risk Score

Malware Insights

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

The PDF contains embedded URLs, with one prominent URL pointing to 'xezojetit.ru' and a query parameter suggesting a lure related to credit karma. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a malicious intent to redirect users. ClamAV detection and ML classification strongly indicate maliciousness, likely a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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
  • 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://xezojetit.ru/123?utm_term=credit+karma+credit+report+freeze
    • https://cdn-cms.f-static.net/uploads/4495973/normal_602c80d9209ea.pdf
    • http://ligexux.iblogger.org/ti_ba_ii_plus_professional_vs_ti_ba_ii_plus.pdf
    • https://cdn-cms.f-static.net/uploads/4418391/normal_603f237b223c3.pdf
    • https://cdn-cms.f-static.net/uploads/4497685/normal_5fd61eecc98ba.pdf
    • https://cdn-cms.f-static.net/uploads/4449185/normal_602ec6ae9a555.pdf
    • http://zegikofabubevel.iblogger.org/bajugivasatipasadare.pdf
    • https://static.s123-cdn-static.com/uploads/4420610/normal_5fff5b6550ac3.pdf
    • https://cdn-cms.f-static.net/uploads/4401519/normal_6038068863be2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kamiwivexa.epizy.com/song_chamma_chamma_new_version.pdf
    • https://307a23dc-bb60-4906-9a68-69e45957aa19.filesusr.com/ugd/d2057d_a9ae6138c1774ba5bb607da7ef01ed8e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ce18aca3-99de-47dc-b4e3-287a01ba86cf/bosataxizes.pdf
    • https://69f6cc44-9198-4e41-bafa-43503dba92bf.filesusr.com/ugd/dec231_fde05fc441e3405b9fd8cd6ec8987897.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5cb8966d-f825-4a3e-b8b7-a4d4fa4b7a0c/30883326940.pdf
    • http://lirinuguwe.rf.gd/avent_bottle_sterilizer_how_much_water.pdf
    • https://f8340159-69ce-4309-ac43-521e9a8475b4.filesusr.com/ugd/bc0b97_78813640100d463380d86000becad6e4.pdf?index=true
    • https://13a7c488-548c-4b48-b567-d2b0b9a3e1de.filesusr.com/ugd/85d67f_b189f18e0f4c401e9347d08db601c542.pdf?index=true
    • http://nifugimifise.epizy.com/45949410160.pdf
    • http://jegegapi.rf.gd/zorinolumevotateli.pdf
    • https://633ee4a5-ef7f-4c35-8c02-ac6c60bc6361.filesusr.com/ugd/0ab374_b8928dccf0504914a8e08a73c9d35e4e.pdf?index=true
    • http://kutukisorato.rf.gd/us_navy_seals_requirements.pdf
    • http://feretuxewimobe.epizy.com/75050376660.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_off0000f418.bin
040c2ff0f9213ce73bd9b61001add600104c050fbca15911c0655c4f32ab9753		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF418 5112 bytes
font_01_sfnt_off00010574.bin
76a2e4c979149754528c8b121f92ba9fce8820525fd6ada2cdad521d726b8590		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10574 11232 bytes

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