Malicious PDF — malware analysis report

Static analysis result for SHA-256 e459fe326ed0aeae…

MALICIOUS

PDF

76.3 KB Created: 2021-03-18 01:19:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d35820b538d2287950a3595da7e256f1 SHA-1: 97f0526aab8196902c95a3210c0ea550c1fb24c1 SHA-256: e459fe326ed0aeaef74dce766a279c51767aea21b376b8d83f498e375ac697b4
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are SEO-optimized to appear as legitimate search results for topics like 'gta mod apk for pc'. This technique is commonly used to direct users to malicious websites or download pages. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/wix?keyword=gta+mod+apk+for+pc
    • http://slmit.fun/favasonakudepasfdx01.pdf
    • http://nazhivy.net/free_zentangle_patterns03snp.pdf
    • http://rerubin.space/73567199434yagfc.pdf
    • http://rukolofi.22web.org/debatiwitojoxim.pdf
    • http://thrivewebs.com/what_is_food_grade_hydrogen_peroxide_35bl104.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lurivukilurufex.epizy.com/vofosasule.pdf
    • http://wexugemo.epizy.com/abcd_2_movie_3gp_video.pdf
    • https://s3.amazonaws.com/lixuzo/centos_6._10_installation_guide.pdf
    • http://pazutoxun.epizy.com/anfotericina_b_efeitos_colaterais.pdf
    • https://s3.amazonaws.com/fodose/bazaar_kannada_movie_dialogue.pdf
    • http://mulotuzasokafo.epizy.com/chemistry_of_hazardous_materials.pdf
    • https://e4586023-485a-43f1-9451-2d404684c5b7.filesusr.com/ugd/95ff22_6f242c7630b540c3ba0236cb3088b053.pdf?index=true
    • https://s3.amazonaws.com/najubu/koninuvarosimawusazovo.pdf
    • https://s3.amazonaws.com/gozifep/39241448766.pdf
    • https://44eeb0f0-4dc9-4d8b-b3fd-cc7ace98e90e.filesusr.com/ugd/a083a1_0d7c40076d0d485c9067e10ca1a471ff.pdf?index=true
    • https://ac614e2c-2e00-43e4-a80f-2c6bce9fb64b.filesusr.com/ugd/f103bb_9780c476e36f4ea0b4aab5001b838b38.pdf?index=true
    • https://35057dd6-1d18-4acd-96c9-af3b7fddc7cd.filesusr.com/ugd/978dd5_63e8f6fbcada4a5fa0e01807cde0bf3e.pdf?index=true
    • http://wevikokuzufos.epizy.com/battle_cats_mod_apk_happymod.pdf
    • https://s3.amazonaws.com/zatazewoz/xefupobiki.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb7f.bin
fdb26d8089368fc562ead36ed84cab7fff94919bc89363d9b6adb598fe835846		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7F 5188 bytes
font_01_sfnt_off0000fd1c.bin
0cc20e5f04ff5f9146a6f55776ab926c35b2676d7b3d42b763721601db1341ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1C 11112 bytes

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