Malicious PDF — malware analysis report

Static analysis result for SHA-256 c997c126a764e78c…

MALICIOUS

PDF

88.4 KB Created: 2021-07-05 23:27:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b8d0c3029d170a4e3eace383992cb4ed SHA-1: 5aac6a1a660cdcabc2389b03ee8581a22e8e2f41 SHA-256: c997c126a764e78cabd3add1551fce3ef7c5e6ea6eb98244fb962677277f8a7b
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of an advance-fee scam. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to distribute malicious content. The primary lure appears to be a 'free template' leading to a scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/16095926c5e18d---filowupovewa.pdf
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e43deb006---wofedapupufowakabisejef.pdf
    • http://pi-consulting.ch/download/kibibuxipimomijatonixiret.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a499f45a541---fesikasam.pdf
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/16537d51c2faa873c11bc3a0063ae0cc/34288847566.pdf
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/1nfjbuf39i0u0c029l2v7d40a1/63437808948.pdf
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a2f68a4fd---25021453048.pdf
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/615245e8067d418785e93ebdd2a4bd54/lifatomazuwebelogizavi.pdf
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/r1s68mpmkft7pqm0hdorb5qqol/30780275730.pdf
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/eb6a6b9835b4ec43970bbea9efedd0c5/61590322318.pdf
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e24c654aede---4756625074.pdf
    • http://gyobel.it/public/file/66061323533.pdf
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/a3e224ff1beb3a0e61c60f3c19cc3ddd/lidawerodugu.pdf
    • http://wjvanderheidedienstverlening.nl/uploads/file/48458984874.pdf
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3080e479a---zidepikuzozalet.pdf
    • https://jordan.si/dokumenti/file/zujeramikonezutadojebize.pdf
    • http://elm3rad.com/file/kefabuzobuxebatusarupeju.pdf
    • http://bmhs1963.com/clients/7/72/7286fd37811b7a5dece6e69924e4d5ab/File/21422169768.pdf
    • http://assushop.com/userfiles/assushop.com/file/valekuz.pdf
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/deu7nklstcmks5dgn94fo1oi8e/zimipa.pdf
    • http://safeabortionnepal.com/userfiles/file/63070162420.pdf
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd66321cb7---20904749223.pdf
    • http://grabnerestriche.at/96186535972.pdf
    • http://splogservice.ru/content/file/rusotunud.pdf
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/sj8u04b514lf69dpg8uq4c68a2/vijonururezusuxinak.pdf
    • http://nuraski.pl/wsg/userfiles/84773658833.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=free+template+powerpoint+2020
    • 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_off0000f5f0.bin
3215a1bf2fefde7c2665d4e74925ea1ae0622471f03ed582bef3dee0f9a19192
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F0 17976 bytes
font_01_sfnt_off0001241d.bin
3d4aebf942a252fba164ecfe2bd5ef318813209f7b826e1b87eaae9ce087a323
pdf-font-stream PDF embedded font (sfnt) at offset 0x1241D 10552 bytes
font_02_sfnt_off00013c2c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13C2C 16792 bytes