Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c8239b201cf51e2…

MALICIOUS

PDF

94.4 KB Created: 2021-09-04 22:23:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 48e456949d9befc7adc50600d8467a41 SHA-1: 96589ac67d5c62e8757c034f549700586ae4812a SHA-256: 1c8239b201cf51e2c97fb8b8c061ab3087ade90b83d963b7b3524c94ff0cb3e0
204 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of an advance-fee scam, presenting a lure related to lotteries or prizes and parcel delivery. It contains numerous links to external sites, many of which appear to be compromised WordPress uploads or disposable hosting, suggesting an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 8

  • 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.
  • 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://crysiq.ru/uplcv?utm_term=neve+8816+summing+mixer+manual
    • https://bocion.com/ckfinder/userfiles/files/kipixagu.pdf
    • https://orderpoet.com/ckfinder/userfiles/files/nasawi.pdf
    • http://falegnameriacastiglione.it/userfiles/files/tomerigenori.pdf
    • http://e-photo.lv/ckfinder/userfiles/files/99425874889.pdf
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e4feab9a6e9---vitarogifixokuk.pdf
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16097beb8024bd---80558242108.pdf
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/84vrg4ed35m9lgg9ck5ip69v55/7114132756.pdf
    • https://airbays.com/userfiles/file/888997589.pdf
    • http://fabtur.ru/upload/files/35913307400.pdf
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/90chrgr2ul73qmqn46t723lgvc/98069036995.pdf
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/d21tumshu0nlegqr0bdgf4idqu/wabufutijozozigijuv.pdf
    • http://nensi.si/upload/file/pobasoforigitid.pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/a54087c2d20a26e26ff0eaf4db2cc591/35362020808.pdf
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/4a458daa3d7f1257c976653a64884854/wujojifu.pdf
    • http://come2menorca.com/images/file/24104498097.pdf
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/538hpbao7t58iabisj7q5is4b5/zikikimasovaji.pdf
    • http://kimhoatra.com/upload/fckimagesfile/44907461631.pdf
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/f36f49267186a0d580cc9b5983ac697b/dufuga.pdf
    • http://tamker.hu/userfiles/file/49432200054.pdf
    • https://gencshoworganizasyon.com/upload/ckfinder/files/41171769962.pdf
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d241ba1e9be---nevaxujo.pdf
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/f84263b7a3e6521e3ec4e1023522d6c2/mibinilebozo.pdf
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/be5154d9047fc08866afe7d83d795f4e/pukifozivewenutakifip.pdf
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/e5ba8a4eb9884bcf33592a468b9090f4/28280945889.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_off0001071e.bin
9fd2c33864a1e94c1e6727817928623cbc1e817ad97d57fa99844ad1c6db975f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1071E 19060 bytes
font_01_sfnt_off00013954.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13954 16792 bytes
font_02_sfnt_off0001516b.bin
6018ccae80fa939ade979783e5f95a859f77581743e87b778749aa2edaaafd95
pdf-font-stream PDF embedded font (sfnt) at offset 0x1516B 10908 bytes