Malicious PDF — malware analysis report

Static analysis result for SHA-256 7619810ff596aa66…

MALICIOUS

PDF

91.1 KB Created: 2021-03-25 16:59:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b6cfe3f63c657f8126d67e2724298554 SHA-1: 06d6c9c9810c1852d33a4b4de4c508f5594ff66c SHA-256: 7619810ff596aa6626423c55c0830b8ef71d000d0764653f57db8d97d5a5a8fb
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The embedded URL points to a suspicious domain, likely serving as a lure for users interested in religious texts. The document body, though heavily obfuscated, contains references that align with the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xajibur.ru/strik?utm_term=kinh+thanh+cuu+uoc+cong+giao+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4410431/normal_5fdbd1aedff95.pdfIn PDF document text
    • https://bonopabugo.weebly.com/uploads/1/3/4/5/134581776/6237907.pdfIn PDF document text
    • https://cdn.sqhk.co/kuxixixixi/gcOD1H6/judolibif.pdfIn PDF document text
    • http://ericksandoval.com/brain_training_for_dogs_scam4efwh.pdfIn PDF document text
    • https://dixosupisuboju.weebly.com/uploads/1/3/0/7/130776754/8211297.pdfIn PDF document text
    • http://mihetos.xyz/solar_system_worksheets_answer_keyy9h0l.pdfIn PDF document text
    • http://lovepositions.info/arjun_reddy_movie_tamil_dubbed_freeonp0u.pdfIn PDF document text
    • https://zadopelujon.weebly.com/uploads/1/3/4/8/134884154/xerefolij.pdfIn PDF document text
    • https://ribupawotomimam.weebly.com/uploads/1/3/4/6/134694318/zogepakomew_juxapemabalira.pdfIn PDF document text
    • http://lajodibibodi.getenjoyment.net/jugekumogaxoko.pdfIn PDF document text
    • https://cdn.sqhk.co/xamowizaso/ShgngcI/taxevubizakilebodegawu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378848/normal_5fcf49eae9429.pdfIn PDF document text
    • http://bifozitixexidad.mygamesonline.org/pronunciation_of_words_in_english.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/48d0c439-d3b3-48b8-a9e2-7b4b51dcba61/how_many_calories_in_a_taco_bell_nacho_grande_box.pdfIn PDF document text
    • http://vuzuwukef.atwebpages.com/15795724174.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82d21876-2772-41ca-9f31-5fe3438124af/lezav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ebe08f4-4f1d-4b85-b19b-b39889f62f09/angela_davis_net_worth.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_off000114ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114AE 5080 bytes
SHA-256: 42430fa218ac8827f5d45cbd56425820293ee95905b0473ae6309f1037d1f646
font_01_sfnt_off00012603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12603 25256 bytes
SHA-256: 220ccdbe19429c6bd809603b3998e921b0c5ee51c35c0d800ff9788943b704b8

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