Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3d92069b6df89f8…

MALICIOUS

PDF

86.5 KB Created: 2021-07-02 13:35:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 24af724385484578963b5d112ffa37eb SHA-1: 1126dcc26dbfd53afd8cb6a37bd58e1454e84bdb SHA-256: e3d92069b6df89f82fc16f48035cca6c042235436c3e6873eeaf6133cc47ca9c
164 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to compromised websites, many of which are hosted on disposable domains or use SEO-manipulated URLs, suggesting an attempt to distribute malware or phish for credentials. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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 link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://smidgel.ru/uplcv?utm_term=need+for+speed+hot+pursuit+download+pc+torrent
    • http://agcslohian.com/userfiles/file/68775027004.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/vmiq696vn3bs7pl0i4nart5d27/nukivewedub.pdf
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/7decc04cece4aab364d5bc9220441ca9/20971404365.pdf
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/aa5upaes3a9pkuvnfbic6623l3/80490575490.pdf
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/feuun7vg3uq0ogfl6lf4slhmmf/52369036481.pdf
    • https://dineflon.com//files/87552941940.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cc4d3ee9194---sepime.pdf
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/a1c48afb868164b7a9fb705a1ad1bb9a/visabewizatasi.pdf
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1f72cae22---41609464099.pdf
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/206cc020b42f87f27ddd53efe6cdfedb/roxogepizelawabesozu.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/33ed6a121fa19fca977f38de08b1b758/gevivap.pdf
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/td38orekaf5oftg1qo9holllp4/dajifukowubuzenegiwikit.pdf
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/sjm9koundiplmti8hgd37p5qho/66055824980.pdf
    • http://canxetaidientu.com/images/file/57051472115.pdf
    • http://dentherapia.hu/files/file/88356509798.pdf
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160958deea832d---55615678617.pdf
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc3ddf34203---68732101785.pdf
    • http://xn--80ahcjevtqq.xn--p1ai/ckfinder/userfiles/files/79033596887.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a85eed35682---59277158133.pdf
    • http://ytlcases.com/userfiles/file/88649480072.pdf
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c321d6110a5---26869485649.pdf
    • http://visit-pune.com/userfiles/file/nogirelikejidipesuregisaf.pdf
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/kuod1utl0pc0mho1ml9vn0qbd7/noxijagunoxu.pdf
    • http://mrbossamktown.com/uploads/files/rugibim.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb96.bin
282000c9f77024b7d628abb5bf048092f90ecdd6fe1a06f25c3a79d7f06085b6
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB96 17980 bytes
font_01_sfnt_off00011b27.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B27 16792 bytes
font_02_sfnt_off0001333e.bin
5d7e3f32afaee8e88f91adfdcfd313b875c0aa30ccd4f28e6bdb7d02b1c65214
pdf-font-stream PDF embedded font (sfnt) at offset 0x1333E 10880 bytes