Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcf74ee9946afb7e…

MALICIOUS

PDF

90.8 KB Created: 2021-06-30 17:16:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e3cc63710d7d0aedcba20a0748769c87 SHA-1: 1a196bb44a5567ffd8e72bb5e48ccdaba32c1273 SHA-256: fcf74ee9946afb7ebc3a5c1d26d22a9ed2500714ebd0caef76e7eefb3b277fe7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL analysis point to a malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • 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.
  • 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://sapporopools.com/contents//files/85351070073.pdf
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/43e94a5c1bef4d2adc768447d2290255/wilejumojosilibukav.pdf
    • http://pinturasoltra.com/images/slider/files/6112996865.pdf
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/5d6a8dba56cf266fcc5d95a750e12d1d/tafeparoj.pdf
    • https://actorconseil.com/files/file/mewogez.pdf
    • http://loveperfectionschool.com/upload/file/fasuz.pdf
    • http://gptools.net/userfiles/file/salakazomokuzonobemoxibuk.pdf
    • https://electrabicycles.pl/app/webroot/uploads/file/16239640514542.pdf
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/a5bc7821bd4ae008f95052fa1733f36a/81588673464.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2e1daf6sm7vq5isqu0vs1noa05/vipimafubidurodipe.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c1999e20773---fuluva.pdf
    • http://ahcxdq.com/uploads/file/211735311474.pdf
    • https://people11people.gr/uploads/File/wurokareberizika.pdf
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/85afd9ec536dd00f39539c5242ca5fd8/12874750389.pdf
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/sg1db2cr30lrbaugkgl3p7fon6/rapofiseriwudij.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baf169f243b---44946616559.pdf
    • https://mytopics.it/uploads/file/92291767956.pdf
    • https://giolog.biz/images/bulk_images/files/budafakigakuni.pdf
    • http://www.puhito.hu/uploads/40677110304.pdf
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160929408b01da---97973569990.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16087430d49726---logaritobasad.pdf
    • http://simonhoirup.dk/userfiles/file/babav.pdf
    • https://asset-books.com/userfiles/file/94798241086.pdf
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16092b400c0063---12077874246.pdf
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098b393a72fd---50702305472.pdf
    • http://chickenwild.com/upload/contents/images/images/lekebiputelezufer.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=cropping+shapes+in+powerpoint
    • 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_off0000ff05.bin
b1e06f6f1b92899586702664afae14550c8829ad211059ee70d63bd0123279a0
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF05 10600 bytes
font_01_sfnt_off0001174a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1174A 16792 bytes
font_02_sfnt_off00012f5c.bin
00bb4aded1adc6f74fa4ad4c84da176ca1f86793f5bde1e76ef3617cfbddc87d
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F5C 17196 bytes