Malicious PDF — malware analysis report

Static analysis result for SHA-256 30f452848c53ac5c…

MALICIOUS

PDF

75.8 KB Created: 2021-03-22 14:46:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4617e166d2a2f28a9a207169605fe780 SHA-1: 20fa647f3204865940f306da9ce91ec27a53a482 SHA-256: 30f452848c53ac5c87f6fa6d4911314d3f3dfc45daefda17579fc30a5a6ca75d
126 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to various external URLs, some of which are hosted on disposable domains, suggesting an attempt to distribute malware or phish for information. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/wix?keyword=the+sims+3+android+apk+offline PDF link annotation
    • https://bekazavaf.weebly.com/uploads/1/3/5/3/135327011/fukozezofulef.pdfIn PDF document text
    • https://kuvitarige.weebly.com/uploads/1/3/4/0/134095916/newixatiniferato.pdfIn PDF document text
    • http://inertbhjbj.ru/72841589439z33j5.pdfIn PDF document text
    • http://pewujok.mypressonline.com/feperamimogobijawak.pdfIn PDF document text
    • https://zogininofifus.weebly.com/uploads/1/3/2/6/132695288/sedolodebanis-mevatapipuno-sulel-taxukebuvigor.pdfIn PDF document text
    • http://tujukesabegakom.mygamesonline.org/54296088150.pdfIn PDF document text
    • http://likedizar.medianewsonline.com/2362946743.pdfIn PDF document text
    • http://13millions.store/speakout_intermediate_2nd_edition_answersy2y1c.pdfIn PDF document text
    • http://pushbiz.fun/the_silver_way_china_spanish_americako127.pdfIn PDF document text
    • http://fuxisileza.mywebcommunity.org/togemomugezo.pdfIn PDF document text
    • http://supariwepexafat.mywebcommunity.org/partes_de_un_motor_electrico_trifasico_y_sus_funciones.pdfIn PDF document text
    • http://qwertyujg.xyz/74905453629s6ayz.pdfIn PDF document text
    • http://miwopejodap.iblogger.org/kisagoralofagovido.pdfIn PDF document text
    • https://nekemobo.weebly.com/uploads/1/3/5/3/135323096/9464028.pdfIn PDF document text
    • https://lebetazukuz.weebly.com/uploads/1/3/1/6/131606644/divubar.pdfIn PDF document text
    • http://sogejovep.mypressonline.com/reduce_file_size_mac_free.pdfIn PDF document text
    • http://texoraw.sportsontheweb.net/nowot.pdfIn PDF document text
    • http://italiabeach.space/45124618414yk1sk.pdfIn PDF document text
    • http://amaryllis.space/24786018274qkbt3.pdfIn PDF document text
    • http://gatorama.fun/sig_sauer_p365_owb_paddle_holster4yn4e.pdfIn PDF document text
    • http://xekilekugud.iblogger.org/17882303210.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kebowikosu.epizy.com/lapuminakuwevadizudezevu.pdfIn PDF document text
    • 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB42 5456 bytes
SHA-256: 462c5552e9d61401e2341619e488a75224271c6d8ed57b9d125a28aeabb9d6a0
font_01_sfnt_off0000fda2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA2 10652 bytes
SHA-256: 78b56481a0db21143035176f0a3081b9396743df5361a6df966f022dbe26d550

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