Malicious PDF — malware analysis report

Static analysis result for SHA-256 236c65f88d5b6070…

MALICIOUS

PDF

77.2 KB Created: 2021-02-25 05:43:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 01f82de427698081af10d6620508d330 SHA-1: bccc8f343b110393076443463d92090b3db27cc3 SHA-256: 236c65f88d5b6070300b53b3ee2f8d4497214e90124f995c815b3ccec6f2e77e
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a large number of embedded URLs, many pointing to disposable hosting and employing search term keywords, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/wix?keyword=pixel+gun+mod+apk+16.5.1 PDF link annotation
    • http://the-english-temple.com/cateye_micro_wireless_cc-mc100w_battery_replacementsrgji.pdfIn PDF document text
    • https://cdn.sqhk.co/litazujizime/fjgWNih/sonnys_belle_vernon_pa_menu.pdfIn PDF document text
    • https://cdn.sqhk.co/disumuneriva/JFiajb1/60237340973.pdfIn PDF document text
    • https://cdn.sqhk.co/sojowidaz/djgnxdQ/world_war_ii_movies_philippines.pdfIn PDF document text
    • http://gakagebir.mypressonline.com/44992750746.pdfIn PDF document text
    • https://cdn.sqhk.co/toromerepowa/frW0b5Z/last_hope_sniper_zombie_war_shooting_mod_apk.pdfIn PDF document text
    • http://mexicotop3.xyz/23346248116u1msg.pdfIn PDF document text
    • http://gejesixave.scienceontheweb.net/lange_psychiatry_10th.pdfIn PDF document text
    • http://copyright-securityx.com/kukuveridovizotirozezcuuq.pdfIn PDF document text
    • http://jorowijedo.mywebcommunity.org/tonuvimexovuxurabovo.pdfIn PDF document text
    • http://viniveba.mywebcommunity.org/doxolanibagotudime.pdfIn PDF document text
    • http://axacheat4.xyz/94757521485lvrnj.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobuwaxegu/hIii3hj/airborne_death_from_above_shirt.pdfIn PDF document text
    • http://redtea.space/tim_holtz_crazy_birds_mini0qowl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kijelopazekune/ronejog.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/42075411751.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/16017863689.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/31339312197.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/will_there_be_twilight_midnight_sun_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/91404681198.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/mimibebutatebiben.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF94 5304 bytes
SHA-256: 65efd18b6ed66c312adcb05e64660f991c7ce3872a3f3759ea34741afc4981b0
font_01_sfnt_off0000f190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF190 12636 bytes
SHA-256: a01e30796e5958b48f03e740759b16473784bb7f09042f9c573d8d669ee311d9
font_02_sfnt_off00011962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11962 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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