Malicious PDF — malware analysis report

Static analysis result for SHA-256 331514b03992ef43…

MALICIOUS

PDF

121.7 KB Created: 2021-06-29 06:06:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fa34cdd80f301347bcb248207346f2b3 SHA-1: f42b6a181dc2c6e9de7f852abeedc2cd5ec7ba93 SHA-256: 331514b03992ef436130ddd4a4d2d23316e17b7ce880f6aa8c91a24f4bdce110
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of an advance-fee scam lure. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms, suggesting a distribution mechanism for phishing or scam content. No scripts were extracted, but the PDF structure and heuristics point towards a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9890

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 https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/846fe08fe41fd1222a26955a25165105/18004788967.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f440217e1d---27665337346.pdf
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ed2366e9c9---57208932823.pdf
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/d3f36nrc2bdl5anrf4cmn045pd/9919907194.pdf
    • http://mya1fc.com/files/ckuploads/files/vokelafuguwago.pdf
    • https://cardion.dk/gfx/fckimages/file/62809558845.pdf
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/6eokictrjc2kvb0labvhsmpdv7/folunoweravabuwurag.pdf
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c84e7991d59---46070146810.pdf
    • https://praward.tw/wp-content/plugins/super-forms/uploads/php/files/3da293e11a0e3567b88c9efd9bfd712d/zumuzatimajerader.pdf
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/70cc306d239e5f5d1dabc25ad6d6d99b/87351987574.pdf
    • http://studiorinaldibedin.eu/userfiles/files/53721467928.pdf
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/bec3fb9c873572a7fe93d50610e16c31/joguvotalonetunopawuzuno.pdf
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f027e9c78---21643282369.pdf
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/8bf2936768c0f36bce14d29fa4830186/bigokonizatow.pdf
    • http://lideparts.com/userfiles/file/1620781745.pdf
    • http://e-cluny.cz/UserFiles/file/jajikefalexowujexetuguduz.pdf
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160ba0f284b5af---fidirulivipekujamuj.pdf
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/da4a21d5fbafaad853385d7c1a4a0e1c/jaludutemakupogisaluwe.pdf
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/12c82f8c81139a9fb7d150c7da9b0805/68746103858.pdf
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/u7f5bthg1qmp7m6l1e8083higa/58513990572.pdf
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/055a7d0fa01f502c39414cbb8c51e6d5/56755802692.pdf
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/cpnh388jsvjupcu6clcekci021/dotamib.pdf
    • http://e-pisanie-prac.pl/famprojekt_z_serwera/images/file/wenege.pdf
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/7425b98af6e7cad897e086365063ef49/baluvisadurimuxex.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=total+area+of+a+triangle
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015ac9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15AC9 16792 bytes
font_01_sfnt_off000172db.bin
587257b20ac9233d7c5d40174736f73bb34c3558286b54cdb7d7349e22c7b849		 pdf-font-stream PDF embedded font (sfnt) at offset 0x172DB 20908 bytes
font_02_sfnt_off0001aa42.bin
5531c26647fca120355ee68163dcd5a117898d9ad4de1394535a174a39d31faa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AA42 10184 bytes
font_03_sfnt_off0001c123.bin
f1dd762ab392e50f302e08a59ae5f665ce8387c4127daba6547abcc2f88fc7eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C123 16384 bytes

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