Malicious PDF — malware analysis report

Static analysis result for SHA-256 d06491a5a153bd35…

MALICIOUS

PDF

85.8 KB Created: 2021-03-17 07:00:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 82104efc06102797122067e5be478bd3 SHA-1: 54a73cfd447276fd27299888c297eae7f81b6995 SHA-256: d06491a5a153bd354c8994f1f776b9276036624b4060d5234dfa0d4af3988b12
186 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many pointing to disposable hosting, suggesting a link farm or redirection scheme. The primary URL, 'https://jumiwimov.ru/strik?utm_term=how+do+i+jailbreak+my+apple+tv+3rd+gen', is presented as a guide but likely leads to malicious content. ClamAV and ML heuristics confirm the malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=how+do+i+jailbreak+my+apple+tv+3rd+gen PDF link annotation
    • http://buyfastedcircle.xyz/literature_review_discussion_and_conclusion9hyf4.pdfIn PDF document text
    • https://sigiduba.weebly.com/uploads/1/3/1/3/131384121/bivutisigo-ginaririzafitam-tirabepi.pdfIn PDF document text
    • https://gunagabivap.weebly.com/uploads/1/3/4/8/134863042/3726a6c8.pdfIn PDF document text
    • https://jevokave.weebly.com/uploads/1/3/4/2/134266272/bebigi.pdfIn PDF document text
    • https://gokulibom.weebly.com/uploads/1/3/4/2/134266198/niruxupuvuv.pdfIn PDF document text
    • http://bcpzonasegurape2-viabcp.com/valiant_mobile_password_resettbmf0.pdfIn PDF document text
    • https://mosevulex.weebly.com/uploads/1/3/4/8/134860143/45817813e1.pdfIn PDF document text
    • https://doxeraja.weebly.com/uploads/1/3/1/8/131871607/cf5756d531562a.pdfIn PDF document text
    • https://xoxomupufolud.weebly.com/uploads/1/3/0/9/130969418/0ec06dced58997.pdfIn PDF document text
    • https://sufifova.weebly.com/uploads/1/3/4/7/134736026/4623638.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://012a8781-80b6-4d33-8f63-56d56ef93f15.filesusr.com/ugd/6d3794_2e1570efbdce401c93b005a7ba478849.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/donarepemi/how_do_i_draw_a_mandala.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/cuando_las_cosas_malas_le_pasan_a_la_gente_buena.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e56a48bb-e187-4e38-93e8-3304b189946a/wisdomtree_cloud_computing_ucits_etf_usd_acc_holdings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6df06eaf-5fba-4531-a544-94513c1c1ae8/how_can_writing_help_reading_comprehension_problems.pdfIn PDF document text
    • https://ab38f0b8-b274-4020-91f3-e6554b072184.filesusr.com/ugd/9c43ec_1fec2ffbef3448bebda9c79b6e5166ec.pdf?index=trueIn PDF document text
    • https://0491f86b-060d-4f4a-be23-b0d01488777f.filesusr.com/ugd/faa7ef_40f8db7ab2414bc39423fbc9403384fe.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6ccec67-9841-48f5-bc8c-cbf432415043/logojituzuralubomikak.pdfIn PDF document text
    • https://6e229dea-1f83-4be8-8cd3-388eabd4f5e3.filesusr.com/ugd/1cfe37_a0a4def2dd4b4e5d8581d408cd16110c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/78793bf6-397a-4310-8443-d23474d09fe9/vikovululu.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/petrologi_batuan_beku.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/26839962957.pdfIn PDF document text
    • https://161abad2-7de2-49bb-9904-d6e2a620a662.filesusr.com/ugd/2eec94_814aa091d7724835b995951c3091d8e1.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_off00010e4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E4F 5760 bytes
SHA-256: 351d3ed36ce53e0b7be94f3fe436894e04047928d1bf10694d06863c6a848cca
font_01_sfnt_off000121f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121F3 11088 bytes
SHA-256: 760c1283a0e7a45ad025a737de693953156c1629c7a9a2dcd573630801732281