Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c195ac995f6f05b…

MALICIOUS

PDF

104.7 KB Created: 2021-06-25 21:38:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2a35cb3f2f2437b640b07fd057dd80e2 SHA-1: a0c7e292b8f5bc6d51614a09a52a73690cbc8cb3 SHA-256: 8c195ac995f6f05b8982df6665505c2fe996b12254e16cc7dc1f1af57348deb6
164 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple domains, many of which are hosted on compromised WordPress sites. The presence of numerous links and the use of compromised CMS uploads suggest an attempt to distribute malicious content or phish users. The document body was unreadable, but the heuristics indicate a link farm strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9790

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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
  • 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 http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/65f37eb7691744822a65d4f030b63cb1/mofoligaxozajadixadakub.pdf
    • http://alisawedding.com/upload/users/files/33360082527.pdf
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/16094669e33659---dojizodibozen.pdf
    • https://propertiproperty.com/Uploads/userfiles/files/75616607077.pdf
    • http://maility.pl_adresuserfiles/file/24145172884.pdf
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/092ba3013a276a29de4d166900ba2980/2689711361.pdf
    • https://bancodevida.com/bancodevida/admin/images/image/file/4144429511.pdf
    • http://safeabortionnepal.com/userfiles/file/4707117786.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/5fp0aapqsoa72n2h2o1okbk46q/rokokilujisegedoxefixe.pdf
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/icblq85f0ccdruanico416uoes/64688660994.pdf
    • https://urbanlivin.lu/userfiles/files/97756716748.pdf
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa2a949ad9c---65337200120.pdf
    • https://bbgpiti.com/userfiles/files/togirufunulaxekuga.pdf
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/a3ad02d9239c2ee3e0e95e55afb33ff4/79196859490.pdf
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160873b12a554f---wapuwujipifiligusim.pdf
    • https://argekaucuk.com/nbg/upload/files/79875276208.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf75b5f0323---suriju.pdf
    • http://globalquestconsulting.com/userfiles/files/rukumogiwofebudoj.pdf
    • http://angelescare.com/userfiles/file/xokisalevoda.pdf
    • http://yoron.net/up/files/tumumojumililalelij.pdf
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160808c758f784---kivisepusidaroj.pdf
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160870fd9bfb86---novemuvamozexubemogefov.pdf
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160855cde03722---35508858358.pdf
    • http://tnslib.su/userfiles/files/demavigazeramav.pdf
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a9dd15da9---bodirolabimuvizop.pdf
    • http://savoie-outils-coupants.com/ckfinder/userfiles/files/34714184871.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=how+to+help+a+codependent+friend
    • 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_off0001356e.bin
d4dd39969f0ad0b52ebd04f0dde7bfcf0aaed42b9a08bcc2f82793c95de73f4f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1356E 10624 bytes
font_01_sfnt_off00014da4.bin
752b77f8653a8e554f21337e460eef6e5d1d7706eb3be8085ae2e02f54fd8cbb
pdf-font-stream PDF embedded font (sfnt) at offset 0x14DA4 17576 bytes
font_02_sfnt_off00017bc7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x17BC7 16792 bytes