Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a193042af336a25…

MALICIOUS

PDF

175.3 KB Created: 2021-06-29 04:36:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 44edacb3dfdb905974d9b87e492244ba SHA-1: 0a77a9a8115703e84cb28347b103ddf15a995f1c SHA-256: 6a193042af336a25c8fbf041158e028646d6ee594015c163b06d354850233f4b
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application

The PDF document exhibits characteristics of an advance-fee scam, using lures related to lotteries, prizes, and courier deliveries. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to distribute malicious content or redirect users to phishing sites. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9915

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://irlanc.ru/uplcv?utm_term=upper+primary+which+class
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c140a05091a---78787973092.pdf
    • https://conexusinternational.com/ckfinder/userfiles/file/sariv.pdf
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b8e8a4b47d---vunuluzerefibagovonisebo.pdf
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1062a814b---99754037689.pdf
    • https://traveletrust.com/basefile/traveletrustcom/files/61315706056.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aed137bdc47---sinivabux.pdf
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b640756947f---lowinodeparawutexojuduvo.pdf
    • http://shiraz.sk/ckfinder/userfiles/files/jefesilesi.pdf
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160764513956a0---xudavibidugemunovevi.pdf
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/c86f6a17c36069b9ea4c1622c5b8c1e5/79476728709.pdf
    • http://alpha-th.com/userfiles/file/komodumobakesajurifeta.pdf
    • http://alnoorcity.com/userfiles/file/95294629263.pdf
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072bc4966f9e---voxusodufugaluniva.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/16091569cd486c---jijawiviraruwiraxavipo.pdf
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a02227e11c2---14597828703.pdf
    • http://beytarimcilik.com/admin/editor_resim/file/14151168020.pdf
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/m2964tjfrclnvu5l4022dmhkpi/23475474405.pdf
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/es03jeulggh9ku5mo7e6lsf9m0/65988119348.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d696445a2df---xutunemadobi.pdf
    • http://sistersaviopublicschool.com/userfiles/file/17866017112.pdf
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/117fc68915358af03a63e4bd12ad7e99/42307978615.pdf
    • http://aimic.com/userfiles/file/rarajiziwokitusijefekages.pdf
    • https://internationalmedia.com/userfiles/file/66830631267.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_off00024e69.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x24E69 16792 bytes
font_01_sfnt_off0002667b.bin
d3a764d304f7b2f67962b62498ba8e445bee2cc2fdae5974ac9d4e64b34e53d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x2667B 19372 bytes
font_02_sfnt_off000298ee.bin
0e0653ce216a4c79d239774118503ce518cb8e5a4456e7fa6ab7ad52bfe430f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x298EE 10524 bytes