Malicious PDF — malware analysis report

Static analysis result for SHA-256 38b472859a6b76f9…

MALICIOUS

PDF

101.5 KB Created: 2021-06-30 06:47:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 87ff7fa1c8fdbfac7e5333fa5e28d272 SHA-1: 13aabb4fe757b89a51fb8e5f2b1d77fb22235238 SHA-256: 38b472859a6b76f9d838dd526288d73598765ca0508f419056b7e8c7985f8ec3
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The presence of multiple PDF link farm heuristics and embedded URLs strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9888

Heuristics 6

  • 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.
  • 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://rayzerfamilyreunion.com/clients/0/08/08e2d5bcffca37c2e1a82d364f4296c6/File/fenili.pdf
    • http://shukokai-voves.fr/userfiles/file/duxupuwudawaxomiziveko.pdf
    • http://tencanpowder.com/d/files/52370312513.pdf
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bf57b787ba8---wijugijogitalazixux.pdf
    • http://yesilderecine.com/admin/editor_resim/file/16859588796.pdf
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/n2234nj3gs0lmqln1i8pe1m6qq/44105933937.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/76efa220fd0bb8af3ae6fdaf372eb06f/61350127788.pdf
    • http://webhenevents.com/clients/868374/File/95032290809.pdf
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/523a921b1f6405cff7d1c79b3e594635/kotogidadesiresinof.pdf
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ade894ceeb2---dovag.pdf
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/rch3nk5pdh12d6c255k15s1qr6/42376612848.pdf
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16090d85a9a31c---28036284368.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a202046a9d1---nigojezurumom.pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/bf28d3a7fd664dfb74530f3c0e56bcd6/pekadimafitubulit.pdf
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/4cf577d914b109f68f76d14f7e9430b4/80209900511.pdf
    • http://dabaizhongxue.com/upload_fck/file/2021-6-10/20210610145939515131.pdf
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/b1c5ecgj4g50p2ijhlm1mollk0/nubugumamekudupon.pdf
    • https://paklya.su/design/img/upload/file/12188586430.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160962f10a193f---87139284370.pdf
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16077691736a15---gowenerovukoza.pdf
    • http://hzjksj.com/images/upload/File/vuvepodezajoxo.pdf
    • https://xanbiente.de/userfiles/file/mexukagotirimedafivi.pdf
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/op6kr8luak0bvo8786vnrklml4/41044739082.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=the+meaning+of+scrupulous
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e49.bin
5abd493983adf2c8afe46e9d09dc84baf4d8448fa6e60f9c60c93ecc4d9fc81c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E49 10892 bytes
font_01_sfnt_off0001273b.bin
081f01f34851aafd35cfdb052d027359b8688af5a15f75b80ca45837ae1a1f4c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1273B 16748 bytes
font_02_sfnt_off00013efd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13EFD 16792 bytes
font_03_sfnt_off0001570f.bin
6065242b75a4f615f317cd2ded6c78eee1d9ccda9893921fc0348d93bc7e5b09
pdf-font-stream PDF embedded font (sfnt) at offset 0x1570F 18828 bytes