Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fa4a63599c05fbf…

MALICIOUS

PDF

160.2 KB Created: 2021-05-01 01:52:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c1b849c5024e907205b543fe7cf4ce9d SHA-1: 2ad814742a89098caafbcf016927fb1e32277924 SHA-256: 4fa4a63599c05fbf062d2fac433416859748bb5a5500419e66cdc963951909dc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The document body's text, though garbled, contains phrases like 'Game karne wala game bhejiye' which could be a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/8ecf5598fceea4ccd269a4295924f9a2/26988410330.pdf In PDF document text
    • https://www.acetechnology.co.in/wp-content/plugins/super-forms/uploads/php/files/adkti28t0murufrmnp2vmesko1/rapapivorowatutewelo.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/t1ocuigjq24qa98dandgi4ir3r/99705524653.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/faa91dc0739007709234ebeea1fee576/vivaz.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16086271b7dabf---87351978755.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/jasorufimazuniram.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/onuod7ng56mj8i8mor3g0tg7ne/vepowawuwagi.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe89fea579---furuzitovepemit.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607297ff3d35c---34844609009.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca4c40282a---pivuxapaxuledagubotefeva.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071865838bd1---lakutijoselal.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5d47d2a19---45791596073.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070b1036e661---rikisukuzonesad.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/fa9148744425e8c01106217a8b18f80e/buxixokasodilij.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084eb003f5dc---mixodelobozowigaxe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=game++karne+wala+game+bhejiyePDF link annotation
    • 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://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001eee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EEE8 3976 bytes
SHA-256: e730fc09d1b25aa08e3bbae94ac0c7f73fd87e9ca5681435d5734a75e345ec7d
font_01_sfnt_off0001fd11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FD11 5424 bytes
SHA-256: 057ee43c32433f8dae6f3c0dbd86bd20804ef52fb721ef255d9bb55cc22e3122
font_02_sfnt_off00020f73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20F73 5812 bytes
SHA-256: fa247e9491aac1432c91c180878f427ef73ded25ad89d54458983d337774434f
font_03_sfnt_off00021e0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21E0A 12584 bytes
SHA-256: 2fb1d739a21a8a857cf113516ac18e5f2e3bfa852d6178ad84e68b5218b7eb81
font_04_sfnt_off00024701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24701 16296 bytes
SHA-256: 324a81904f32a03c2c39ad46cacadb2ca91eb69061b3bfb36189b4743333f134
font_05_sfnt_off00025cea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25CEA 5640 bytes
SHA-256: 270a948b97a1a9250bd0f4d38f21751d52141fab189e9c3079e8a39f854cb1d7

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