Malicious PDF — malware analysis report

Static analysis result for SHA-256 afce6653f183a3b7…

MALICIOUS

PDF

88.3 KB Created: 2021-03-17 00:46:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4ccb24603b80a5d3be331d056390ac8 SHA-1: 1b8c488012de078e651fc6007a81abc1cf2426e7 SHA-256: afce6653f183a3b7a245bb96ce9fda8bc887c8810d69d35d56284f354de2e2c2
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly and other file-hosting services, indicative of a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://botokaw.ru/award?keyword=mathematics+dictionary+english+arabic+pdf
    • https://gazulaloruvuv.weebly.com/uploads/1/3/4/6/134693071/9138238.pdf
    • https://wabobileminila.weebly.com/uploads/1/3/5/4/135400898/fedef.pdf
    • https://diwijavel.weebly.com/uploads/1/3/4/6/134691177/ximeniked_mufofamiz.pdf
    • https://kilekofizinovi.weebly.com/uploads/1/3/3/9/133997912/rinupozumogar_daluno_vuxukelixe.pdf
    • https://xegogebereduxu.weebly.com/uploads/1/3/1/1/131164392/8f0d9a60.pdf
    • https://cdn.sqhk.co/mivuxakadu/Ljhgfgd/best_dice_combo_kingdom_come.pdf
    • https://cdn.sqhk.co/busoleva/gjdOahf/2014_shelby_super_snake_widebody_for_sale.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/xopugup/52986058432.pdf
    • https://11ab4cf5-156d-4417-99e9-5039b2a7eb5f.filesusr.com/ugd/82d61e_9e39977d3e1d4acc92fea2ff4c43c39a.pdf?index=true
    • https://s3.amazonaws.com/jamuluvuvava/figesufagow.pdf
    • https://uploads.strikinglycdn.com/files/1f8a7b28-4f3b-452f-aedc-63fcd3251fba/xokodomikutumipifitavov.pdf
    • https://76f5a3e5-08d8-4581-9975-6c1b933a1845.filesusr.com/ugd/dbbd16_97f2cbe9c5684d77a4625027ae2d0957.pdf?index=true
    • https://uploads.strikinglycdn.com/files/406172cb-ccd2-412e-88a4-06854e4d2ed7/40138039460.pdf
    • https://uploads.strikinglycdn.com/files/14f5e0f2-f8c6-4a61-a16c-04faaef20bf7/76144498570.pdf
    • https://s3.amazonaws.com/zoxewudunigus/foxtel_tv_guide_espn2.pdf
    • https://5ce19dfa-329f-495d-88d1-e1e7834d9072.filesusr.com/ugd/d902bb_7874777208df42bbbf46ea148c7dd912.pdf?index=true
    • https://uploads.strikinglycdn.com/files/95acbc1d-8619-47c3-886f-da6ebfa0b4f4/62869261669.pdf
    • https://f2fffe36-c7b4-4b88-9608-518dc6c14750.filesusr.com/ugd/950b2a_054c4d1975f042feb16ae9137c96aad9.pdf?index=true
    • 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
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00010f22.bin
976a6b557b585b04d76798ddc8f48ba944426a7d76558707cf61699ac5251a97		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10F22 29148 bytes
font_00_sfnt_off0000d999.bin
58a84bb2d5f67ade487e26c876d18eebe893edc0d0cb3a5f1eb94122dc9c97dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD999 5604 bytes
font_01_sfnt_off0000ec83.bin
8a042193e8d4c05577edd0d9d5eed64ad28a91e797c3c6bb1fc885ee2146922d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC83 10032 bytes
font_03_sfnt_off00014396.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14396 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.