Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3a18ad795e40e7f…

MALICIOUS

PDF

82.1 KB Created: 2021-04-01 06:24:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e841a0afe1c3903d5bf4cf14a0471bef SHA-1: 193638fecd6da7d5b25359cf593f92c19e94cef8 SHA-256: e3a18ad795e40e7f48e268acbcaa7dfba39a47898aba58ab1ef200d1936975a9
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, with the primary malicious URL being dafemum.ru. This suggests the document's purpose is to redirect users to potentially malicious websites for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://dafemum.ru/award?keyword=chainsmokers+something+just+like+this+piano+pdf
    • http://euromarket.pro/taylors_theorem_proof_in_real_analysisdocbe.pdf
    • https://povutepumik.weebly.com/uploads/1/3/2/7/132741486/5a138ae.pdf
    • https://bopilopuneliniw.weebly.com/uploads/1/3/5/3/135304065/998d59.pdf
    • https://petovowatudero.weebly.com/uploads/1/3/1/6/131606592/genidife.pdf
    • https://fubuwadedaxas.weebly.com/uploads/1/3/4/8/134897716/jikapofaguzag.pdf
    • https://sorafenime.weebly.com/uploads/1/3/4/3/134320910/4cfbb837aea4e.pdf
    • https://maruvape.weebly.com/uploads/1/3/4/8/134854924/pavokupelu-botimu-kebejokukebigar.pdf
    • http://meetsalle.xyz/5e_phb_freebria2.pdf
    • https://zuzatalo.weebly.com/uploads/1/3/4/3/134326893/9539391.pdf
    • http://shopyou.online/2018_ford_mustang_gt_premium_pricej00k0.pdf
    • http://usesalle.xyz/how_to_replace_a_ford_escape_key_battery6kbkb.pdf
    • https://natapoja.weebly.com/uploads/1/3/0/8/130813782/silexidilegeg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://e108c0fa-8e70-4110-aab7-e0d30777705f.filesusr.com/ugd/d9966b_6032161de6794683ade75e70403472ff.pdf?index=true
    • https://f59c0a4d-c104-43ac-8966-a5978cdf1b8c.filesusr.com/ugd/0c1ebd_7fc6407a672845cbb742361db4d1b31b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4476108b-74bd-46a2-ae30-6a1c4cf3faf8/how_to_wind_a_bobbin_on_a_necchi_sewing_machine.pdf
    • https://a12a05ab-6462-4855-b086-b0a2a961d6d8.filesusr.com/ugd/2c76f4_7ecd5dcba4b949d9a545eb65c62935a3.pdf?index=true
    • https://uploads.strikinglycdn.com/files/245b0446-490f-4b8f-9e45-d3b561a1582c/mexotovuxopapipun.pdf
    • https://f856bbc4-01c8-45e4-8891-a53c5ee59fd0.filesusr.com/ugd/8e827e_3784cfa07fd94c07a533c8fb6a6e6c7a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/17ba9f3f-2fdb-4e75-ab5d-c23635441f61/dark_souls_3_guia_completa.pdf
    • https://uploads.strikinglycdn.com/files/6496c175-c6cb-4ceb-bedc-094891c7c1bf/how_to_reset_acer_aspire_e15.pdf
    • https://uploads.strikinglycdn.com/files/8f67ded3-f397-4ea9-b9dc-d72eb0605e0e/how_to_determine_level_of_care_substance_abuse.pdf
    • https://76bf42c0-7447-45ed-8dd3-33f9786ae3ae.filesusr.com/ugd/ba2c19_ddbea6b429c74b6b81c62370a06ccc23.pdf?index=true
    • 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_off0000f1e3.bin
1f57aaa4e92957d806176e15114b87e64a93a043fffec7a30061b03bf6ad184c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E3 5500 bytes
font_01_sfnt_off00010472.bin
2b4ec2d4ba995dd369b8a934801797f05df54197411ec0ddb45eadbdf2d2af7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10472 11852 bytes
font_02_sfnt_off00012cdb.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12CDB 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.