Malicious PDF — malware analysis report

Static analysis result for SHA-256 a074931214d269c8…

MALICIOUS

PDF

88.2 KB Created: 2021-03-15 21:49:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2fce265342913f5497bc2ae54c481f0 SHA-1: d79e9d99e394af176fe99c58fd5a35ef21c3fd59 SHA-256: a074931214d269c8d4c606baa66cae47302dd874b5b322858bed78ea770b39a9
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, which is a common tactic for SEO manipulation or phishing. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were extracted, the presence of numerous URLs suggests the document is designed to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://leonvi.ru/wix?keyword=vizio+e470i-a0+specs
    • https://torovuzexas.weebly.com/uploads/1/3/2/7/132710592/wukogarodeli.pdf
    • https://cdn.sqhk.co/ramojezi/ajghjjj/simcity_buildit_layout_level_20.pdf
    • http://rexuwoxaga.sportsontheweb.net/20616542942.pdf
    • https://cdn.sqhk.co/zivuzigup/hriajeW/lavender_s_blue_sheet_music_piano.pdf
    • https://cdn.sqhk.co/datawafag/iLhgheu/71071240292.pdf
    • https://cdn.sqhk.co/sujubowip/ecG5hbi/jeveserolukebul.pdf
    • https://dunipilulu.weebly.com/uploads/1/3/4/8/134880259/powazade.pdf
    • https://worijuxadije.weebly.com/uploads/1/3/4/8/134863955/66552763d39b.pdf
    • http://juxefagag.22web.org/nuevo_uniforme_pureza_de_maria_bilbao.pdf
    • https://cdn.sqhk.co/xaranoraf/oAUkoNo/facebook_desktop_app_for_windows.pdf
    • https://viledilexemapol.weebly.com/uploads/1/3/4/6/134698440/6900d2674d.pdf
    • https://narobukedezupe.weebly.com/uploads/1/3/0/7/130738621/7555520.pdf
    • https://xagufiwukana.weebly.com/uploads/1/3/4/6/134694649/pekoz.pdf
    • https://gotivewa.weebly.com/uploads/1/3/1/0/131070711/ralib_nijomimokomuse_jivevilolem.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tofupewo.rf.gd/bosch_glm_40_professional.pdf
    • https://s3.amazonaws.com/tesodagiwor/34072147973.pdf
    • https://s3.amazonaws.com/pidufozu/67507047974.pdf
    • https://s3.amazonaws.com/pilazi/13439229562.pdf
    • https://s3.amazonaws.com/diwitapezu/golden_song_season_3_facebook.pdf
    • https://s3.amazonaws.com/nilafafakem/sevelin.pdf
    • http://purewowesajumu.myartsonline.com/fifexujune.pdf
    • http://gawexerexi.rf.gd/29953240029.pdf
    • http://dopexatatadad.epizy.com/satofadepas.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_off00011828.bin
44be47699cb7522a79b91c0e59b946898c99e532992272f1a61cc24f03505774		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11828 5156 bytes
font_01_sfnt_off000129e3.bin
e5ced5bcfa89b95a02474af50061151cdec3d63dc4fd4b4e845a63fe9f93f4a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x129E3 12424 bytes

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