Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e080c119d8b9e21…

MALICIOUS

PDF

82.3 KB Created: 2021-04-04 18:42:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: a361deb66ac75f31edf5fd02444a1d39 SHA-1: 94c42db667f8a3080c14cfcec99704885bf6c41c SHA-256: 8e080c119d8b9e21105a0c989e8447b8c1b21dec3b74e0382596aebc51c80b64
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, with a primary external URI pointing to 'https://jumiwimov.ru/strik?utm_term=why+does+feet+smell+like+vinegar', suggesting a lure to a malicious site. The document body, though heavily obfuscated, appears to be a disguised search result, further supporting a phishing attack vector.

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://jumiwimov.ru/strik?utm_term=why+does+feet+smell+like+vinegar PDF link annotation
    • http://dinewegivogofe.mygamesonline.org/folari.pdfIn PDF document text
    • http://supanigavig.iblogger.org/2000_toyota_avalon_xls_manual.pdfIn PDF document text
    • http://lejidakoxinetog.mywebcommunity.org/averroes_obras.pdfIn PDF document text
    • http://lakuberik.mywebcommunity.org/body_language_of_attraction.pdfIn PDF document text
    • http://zakazuvanadoze.66ghz.com/xikurarixoveg.pdfIn PDF document text
    • http://serawuv.mygamesonline.org/lasujulagazalipisuxifusog.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/robumuduluwise/guided_busway_lost_property.pdfIn PDF document text
    • http://wobalewir.epizy.com/81158946503.pdfIn PDF document text
    • http://livuwiga.rf.gd/neferodomev.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/street_fighter_3_third_strike_apk.pdfIn PDF document text
    • https://37bcb4aa-7747-4ff6-a352-0e22bf983c21.filesusr.com/ugd/4393d3_c5cf68cddfde4d5c934c1f3ee62b82f2.pdf?index=trueIn PDF document text
    • http://domebiwek.myartsonline.com/batuzogixazek.pdfIn PDF document text
    • http://gepafelixadu.onlinewebshop.net/bleeding_from_the_digestive_tract.pdfIn PDF document text
    • https://0c6b2c5e-c852-454c-8c01-bea24f6181fd.filesusr.com/ugd/b97644_e10a2c40d1a74cd9876a89db16e93947.pdf?index=trueIn PDF document text
    • http://vomewudige.atwebpages.com/emotional_intelligence_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/vocales_para_colorear.pdfIn PDF document text
    • http://dokudaruriwiv.atwebpages.com/aviation_dictionary_jeppesen.pdfIn PDF document text
    • http://pisotusapuveg.epizy.com/exponent_review_classwork_answer_key.pdfIn PDF document text
    • http://vifidumefitur.atwebpages.com/53119229902.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/pedoxo.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_off0000fa04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA04 5348 bytes
SHA-256: 32e98e15618d8fd1109cd5874fa068c0d2a1664804ee8f3801199f55f22cb68e
font_01_sfnt_off00010c22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C22 9836 bytes
SHA-256: 3c1da4113158dd8a42175d178bd8063d8cb79fa96da48b809b69896234aeb44d
font_02_sfnt_off00012dbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DBE 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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