Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ec165f00dc9816c…

MALICIOUS

PDF

82.9 KB Created: 2021-09-09 06:51:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5978911497e93be0f28b2b8ec4cc0a77 SHA-1: fcc1cc70c8047bfa7419c5b39efaab9805f94c34 SHA-256: 2ec165f00dc9816ca551013143b5915f24b4e7ad4f1b9b55de4218d8840e2bed
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting an attempt to redirect users to malicious sites. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classification strongly indicates maliciousness. The presence of a URL with 'roblox hack account with robux' in the UTM term further points to a phishing or scam lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://infrive.ru/uplcv?utm_term=roblox+hack+account+with+robux PDF link annotation
    • http://mothertheresapublicschool.com/userfiles/file/bipitepuzuwadediwolej.pdfIn PDF document text
    • http://sooclose.eu/upload/File/76885285067.pdfIn PDF document text
    • https://gifarlcm.com/upfiles/editor/files/kuxake.pdfIn PDF document text
    • https://istanajp2.com/contents/files/vanezagonexagorudibezu.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/ef021429838c219a184f1d1975c20a6f/nabuzasaxujowulotitulilu.pdfIn PDF document text
    • http://bdsps.org/slbdavbatala/userfiles/file/gabegoxuwen.pdfIn PDF document text
    • https://shriayurvednagpur.org/public/ckfinder/userfiles/files/7250770578.pdfIn PDF document text
    • http://canyonmeadows.org/userimages/72171881953.pdfIn PDF document text
    • https://brs.jo/userfiles/files/lofuwagerisawakonomu.pdfIn PDF document text
    • https://mancomunidadvaldizarbe.com/userfiles/files/minilidekewapobumimamoxun.pdfIn PDF document text
    • https://guijek.com/userfiles/file/woras.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136861e33aff---tarevafarosa.pdfIn PDF document text
    • http://www.civilhospitalpalampur.in/img/uploads/files/xebiwibikilaluvur.pdfIn PDF document text
    • http://vikohasanfiber.com/upload/files/dokijisivofodaxad.pdfIn PDF document text
    • http://wpscrm.in/uploaded_files/userfiles/files/lotanapowubunavepubol.pdfIn PDF document text
    • http://purepoem.com/resource/docContentImg/file/2021-09-05/1d3534134dfa736a0aa95e6cddd032e4.pdfIn PDF document text
    • http://thepokewave.com/uploads/files/83415074680.pdfIn PDF document text
    • http://escrima-rlp.de/userfiles/file/pabejasiwujogo.pdfIn PDF document text
    • https://nepalonetours.com/userfiles/files/xavijiretoxisi.pdfIn PDF document text
    • http://turinhotelcompany.com/userfiles/files/20244713223.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/d1d56bc3e0ae916dda565588d34dcff2/ralopisenu.pdfIn PDF document text
    • http://artc-polymers.com/upload/images/files/gisavomataporejiber.pdfIn PDF document text
    • http://dralituncer.net/userfiles/file/30655729259.pdfIn PDF document text
    • https://people11people.com/uploads/File/71362549809.pdfIn PDF document text
    • https://delta-relay.be/userfiles/file/28131489265.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/264a7415be64c5ffedf742c2c959f882/liwixerufipofederi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ded1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED1 18180 bytes
SHA-256: f76d549412b61eb20518b0d2adaffca7784b5792adbf83e0d422cb0968b28949
font_01_sfnt_off00010dc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000125d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125D9 10592 bytes
SHA-256: 595024496955bc3dcaab70c13debb761580bc10d5bc4a963929f8c1826432c51

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