Malicious PDF — malware analysis report

Static analysis result for SHA-256 adff19576968dc95…

MALICIOUS

PDF

76.9 KB Created: 2021-03-25 08:40:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: e9f4a492d1333edfda3557e352a85380 SHA-1: d8f2468fa98424da2be2bf626e731e8744693af4 SHA-256: adff19576968dc954ba5bdc8e4caae98f55be913eed91b4a132f0cd1ff7910f0
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, many of which are hosted on disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://golowaki.ru/wix?keyword=the+black+key+pdf+download PDF link annotation
    • http://ogranicbio.fun/insinkerator_66_fitting_instructionsn90a6.pdfIn PDF document text
    • http://openplafond.xyz/zojesudunovududafexoluvf2r7.pdfIn PDF document text
    • http://zotoxilob.getenjoyment.net/resumen_de_la_biblia_genesis_por_capitulos.pdfIn PDF document text
    • https://cdn.sqhk.co/taranumota/jcidhg3/bhimavaram_bullodu_telugu_songs_naa_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/tisezalave/fD5nhN0/74707969506.pdfIn PDF document text
    • http://itawegan.space/android_studio_sdk_manager_missing_from_toolsx8e0s.pdfIn PDF document text
    • https://cdn.sqhk.co/moturalogupe/a42jRid/minecraft_pocket_edition_mods_0._15._4.pdfIn PDF document text
    • http://sabumow.mygamesonline.org/dolibepu.pdfIn PDF document text
    • http://gooddevice-online.com/1532803491dvfgj.pdfIn PDF document text
    • https://cdn.sqhk.co/xubuzivo/gcgdfWw/photo_studio_box_for_shoes.pdfIn PDF document text
    • http://giveaway2020.info/9107224922i7aae.pdfIn PDF document text
    • https://cdn.sqhk.co/siwemawatu/egjivhj/7741989729.pdfIn PDF document text
    • http://mattelipsticks.site/is_157_a_good_gre_quant_scorern68n.pdfIn PDF document text
    • http://invitesistem.ru/jimamimomeralimor9gs.pdfIn PDF document text
    • http://gutagige.sportsontheweb.net/wirorisixuboposetujat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jinixoxugud.rf.gd/be_alright_ariana_grande_piano_sheet_music.pdfIn PDF document text
    • https://d535694a-3e42-4eb2-b7c5-4785544c3741.filesusr.com/ugd/9b7d8a_d846f9c4b2bb490cbbc4ecd8b90cb0df.pdf?index=trueIn PDF document text
    • http://xejarejunap.rf.gd/fudod.pdfIn PDF document text
    • https://22fea36a-5e19-4af1-b4aa-fe6e1efe0ee9.filesusr.com/ugd/b5a188_51d97ce664ee4aad9507143bed5b8ac5.pdf?index=trueIn PDF document text
    • http://rubijisezet.epizy.com/fejejozibigiwadazowan.pdfIn PDF document text
    • http://nujiwuf.rf.gd/debowitixixugizifukaxa.pdfIn PDF document text
    • https://dc58184e-bbba-402a-8e08-a55d552c8f3f.filesusr.com/ugd/0ebc1f_82c210897b584abebd32bbbcc3d0919e.pdf?index=trueIn PDF document text
    • https://ef9935f7-a918-44a1-999f-f1d50a45e4a7.filesusr.com/ugd/b463f2_570b4366d04b466097e01a60ffd0377f.pdf?index=trueIn PDF document text
    • https://b03e51a8-7171-48c0-94d6-e4c032e6f37f.filesusr.com/ugd/9421c8_55019eedf68c46428024022d643dead8.pdf?index=trueIn 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_off0000f082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF082 5316 bytes
SHA-256: 93758c3a2d88de7e549db8e8c1f1298320909c1ba5e72c1f15a30cc03c073714
font_01_sfnt_off000102ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AE 10580 bytes
SHA-256: 291774e7170e4a3c73b152540390954556601b7605bcab0d57e25d5cb0da0df8

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