Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1a612a4055c69bb…

MALICIOUS

PDF

68.4 KB Created: 2021-05-14 04:43:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c2a56f1c2de2bb44068dff7cef14ffa5 SHA-1: f664c9789e9e1961fff4c1492ebcc78f161b54ed SHA-256: a1a612a4055c69bb98738372f2417c036f6925e1c086d4252f7e39ec442060ca
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. The document body, though heavily obfuscated, appears to be a lure related to a crib manual. It contains an external URI pointing to a suspicious domain, which is likely intended to redirect the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://kuzutuzo.ru/strik?utm_term=davinci+kalani+4-in-1+convertible+crib+manual PDF link annotation
    • http://24goodstore.site/41154511123j48pd.pdfIn PDF document text
    • http://pedron.fun/200125425977gc1u.pdfIn PDF document text
    • http://mrshadow.net/vozazirumasowozozonakixe7zoy.pdfIn PDF document text
    • http://esplus.pro/cortisone_shot_shoulder_bursitisap7o4.pdfIn PDF document text
    • http://jisubumutowegur.22web.org/depizegefi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dipafuxe/kewavobobugujinusi.pdfIn PDF document text
    • http://surofavuvaxono.epizy.com/nato_phonetic_alphabet_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/28456861448.pdfIn PDF document text
    • https://77cbb24c-feae-490b-854c-0a9d4db21a85.filesusr.com/ugd/3752ea_189db594ad9143cfbd74bdace6ec766f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/printable_backstage_pass_template.pdfIn PDF document text
    • http://jimifodapamusos.rf.gd/bartholinite_et_grossesse.pdfIn PDF document text
    • http://lowemugujirowox.rf.gd/genetically_modified_food_essay.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/flat_stanley_book.pdfIn PDF document text
    • https://52a1af19-6946-4c37-aba6-ab00a30e4874.filesusr.com/ugd/5dc3ca_5eefd9073b0942d48efbd2b766420160.pdf?index=trueIn PDF document text
    • https://71da2aa5-51c3-4f2c-ab18-08bbbad20131.filesusr.com/ugd/d216cb_5c55de64062746e5baa5f80b56bb81d0.pdf?index=trueIn PDF document text
    • https://8ed7b8cb-9bae-4def-ad9b-66b28cd11f91.filesusr.com/ugd/740d8c_6bf6baab18704f209684a2ed0d15938f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/12200954671.pdfIn PDF document text
    • http://zotozonon.rf.gd/fanimurezajutozujiwazevig.pdfIn PDF document text
    • https://5090c2af-253d-40c3-bfb7-942fc6db26b0.filesusr.com/ugd/0511f5_e531a8925ab94464b5ff64e9e38ec99f.pdf?index=trueIn PDF document text
    • https://e85625e8-91d5-48c2-95a4-67b7b95d5b39.filesusr.com/ugd/b97a97_6a01b048e6e244dfa455bfc5bd72104f.pdf?index=trueIn PDF document text
    • http://jaremov.rf.gd/86358278253.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_off0000ce6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE6A 5200 bytes
SHA-256: e97d7695c8646589a81b9f73025f8db03ceefd181aae7c8e48c3da42346b637b
font_01_sfnt_off0000e02e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE02E 10456 bytes
SHA-256: 1ec4dee61d48f5a5a0da21030ef4433edd5fbddfa776fe13e613443de2474f6a

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