Malicious PDF — malware analysis report

Static analysis result for SHA-256 846dec2d0e930f5a…

MALICIOUS

PDF

96.8 KB Created: 2021-07-10 00:15:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8cb98614267b82a6d4bc8b3f1d3356a6 SHA-1: 9ec2e1bb56747d194de28a7b5b2e51b57b582e8e SHA-256: 846dec2d0e930f5acb8553077df05fa49c8b9ca6e9b3c1603fef34c506e52a32
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of an advance-fee scam, presenting a lure related to lotteries, prizes, or parcel deliveries requiring payment. While no scripts were extracted, the document's structure and numerous embedded URLs pointing to potentially compromised or disposable hosting suggest an attempt to redirect users to malicious content or phishing pages. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 6

  • 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 https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/611606a7ee5c41468049de93463078fd/88524619576.pdf
    • http://ticaproduce.com/ckfinder/userfiles/files/zixeluxufazeredesa.pdf
    • http://goref.ru/files/file/6824242584.pdf
    • http://ccforum.kr/uploads/file/1623772796.pdf
    • http://energo-winstal.pl/userfiles/file/93792732606.pdf
    • http://better-pharma.com/images/file/files/jibig.pdf
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/c0be4272016777a0157a281b1839fd91/ponipumoweluzu.pdf
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609846a160b3a---bakarukivetawadavuv.pdf
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609890cac1141---taxurekazalisusizuv.pdf
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16090e9c7482c9---mutadivumafarabemomokogam.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/h1tvl6k2b05qpcetaf9ca3vh23/3292336061.pdf
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/rijuxeweserapezudigup.pdf
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/869d967c30a8a90b4354a7e9a6fcae49/94667880510.pdf
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/d09e05b1cb4e5e239e442794b7738b9f/refanerov.pdf
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/477d3a83ffca417c0c7e3f0e677eab33/satixozatetowesap.pdf
    • http://sneedfamilyct.com/clients/44919/File/20793294957.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16080507583db1---69341861291.pdf
    • http://petraifevronii.ru/ckfinder/userfiles/files/lijiwidilav.pdf
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/929mv0uv49dic6mig76llkttnb/vusitegorekazu.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/b1e4be6a86a5b370cb21a379189b7694/28501346888.pdf
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/985416099609ce2cbceda0.pdf
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/748597e5aa63735a2739fd0e7684aa07/vutezuramajasubisewutu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=ancient+rome+printable+activities
    • 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_off00011a5b.bin
d313188080b77dbc4658da772c1b6dc2abd294662426a7af809a574659940195
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A5B 16684 bytes
font_01_sfnt_off0001458c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1458C 16792 bytes
font_02_sfnt_off00015da3.bin
107fe794dc1ec9e8b5124560be52afa8e5cf503660b2ccd089d4c44b9cb6c0c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x15DA3 10720 bytes