Malicious PDF — malware analysis report

Static analysis result for SHA-256 97733705c8944e11…

MALICIOUS

PDF

71.9 KB Created: 2021-03-08 01:23:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a359de4d6db4b4f4c961ba655bf1139 SHA-1: 7f6dfcf973e05f2e726fb72f8aee38b5a9afa212 SHA-256: 97733705c8944e1192b73bd497a2677085d9e0552961cc6fb34562b42d4531d7
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to manipulate search engine results. The document body, though heavily obfuscated, contains keywords related to search queries, suggesting a phishing or SEO scam. ClamAV and ML classifiers confirm its malicious nature, specifically flagging it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://soxebez.ru/wix?keyword=philippine+retirement+authority+facebook
    • https://sejumajofejopib.weebly.com/uploads/1/3/2/7/132740214/6799100.pdf
    • http://instapriz365.site/bifotapesemeluzavmiwwr.pdf
    • http://xirixakexove.iblogger.org/luzow.pdf
    • https://woninulanomawij.weebly.com/uploads/1/3/4/6/134670754/pipifefurugi_bevoxokuvunipus_kidegizi_liromepanulu.pdf
    • https://zomimodobi.weebly.com/uploads/1/3/0/7/130739583/xifimaje_rinifigaxevaje_fudenagowobe_nikagekusome.pdf
    • http://russianpatentexpert.com/jesus_calling_devotional_apphjv3b.pdf
    • http://zezasarasojid.mywebcommunity.org/ramevotamogi.pdf
    • http://stickerrus.ru/2004_jeep_grand_cherokee_owners_manual4kcp6.pdf
    • http://2gusevshop.space/11158759184ent9f.pdf
    • http://mumezofenina.22web.org/fofuf.pdf
    • http://zodatowafe.getenjoyment.net/3438368554.pdf
    • https://jesofoxera.weebly.com/uploads/1/3/1/4/131407857/d17e35379040be8.pdf
    • https://lobovalosidim.weebly.com/uploads/1/3/1/4/131437181/xapali_kusanodobuxuji_ketukexeme_tutuzovewek.pdf
    • http://radusama.22web.org/pewuzagaveko.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://44f68060-d5e3-4d58-b4e7-e3760392f352.filesusr.com/ugd/49488e_4f99ebccbbb04b9aaa335e4542b5e951.pdf?index=true
    • http://sibexelopuni.epizy.com/corporeal_beast_guide_rs3.pdf
    • http://kudawugijamino.rf.gd/42779734157.pdf
    • https://3c8197b3-f999-4f29-b3da-fbdfea3dbf34.filesusr.com/ugd/0047a4_094cb9bf4aae411b9ded5e33bb378713.pdf?index=true
    • http://sasavinoseg.epizy.com/kitchenaid_stand_mixer_white_5_quart.pdf
    • https://5a11eff3-0c7a-45dd-bb89-060d4d4d2060.filesusr.com/ugd/72216b_c5c98eece9214830b6c66b37e7b0f490.pdf?index=true
    • http://vexolofifete.atwebpages.com/73446068569.pdf
    • http://kugukokoner.myartsonline.com/bunitoviborowigedi.pdf
    • http://ragomoxos.rf.gd/60407799549.pdf
    • https://34e51215-b586-4e01-b3ea-a219475a7b91.filesusr.com/ugd/46481b_faa9a17f91364899b82e97e601aa6550.pdf?index=true
    • http://soripewanadu.rf.gd/59825884415.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_off0000dc53.bin
e4a692ba2012f17f2de67817d8204b9bf5090ff7080cdc56ffd883b9d8130acd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC53 5384 bytes
font_01_sfnt_off0000ee82.bin
16f149fd6ace2f5c2cc22e00559a1b829bc3e266cc4d49d99aa8df4bc1978c0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE82 10412 bytes

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