Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfac86197f2b9e1f…

MALICIOUS

PDF

82.8 KB Created: 2021-04-01 15:09:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2bdbd5eb1036d4ba6823a0ea65b22da6 SHA-1: cef9ca38112e8501915ff209f0c2b55814e5cb18 SHA-256: bfac86197f2b9e1f29d585c46322386da5182b2f562b035e1d6045c86986d1c3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML classification and ClamAV, as malicious. It contains numerous embedded URLs, many of which point to disposable hosting or suspicious domains, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to search queries, reinforcing the lure aspect.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://bologen.ru/award?keyword=soil+erosion+causes+and+effects+pdf PDF link annotation
    • http://usersonlineguardingsettings.site/accounting_ledger_bookve4jw.pdfIn PDF document text
    • http://pegoluzalep.22web.org/how_a_semiconductor_wafer_is_made.pdfIn PDF document text
    • http://idealslim-italiaofficial.site/intriguing_lateral_thinking_puzzlesx4n8b.pdfIn PDF document text
    • http://youralteragoods.com/934611187864ruj2.pdfIn PDF document text
    • http://centerbluebadge.com/rumerd8k8z.pdfIn PDF document text
    • http://groby-ritual.online/family_tree_worksheet_for_adultskowej.pdfIn PDF document text
    • http://wownatural.fun/half_blood_prince_movie_posterqwas8.pdfIn PDF document text
    • http://best-store.club/bodyguard_songs_free_teri_merig1u1r.pdfIn PDF document text
    • http://all-casino.xyz/arduino_uno_r3_schematic_kicadp43or.pdfIn PDF document text
    • http://guitar.su/how_to_check_formula_in_google_sheets3t3z7.pdfIn PDF document text
    • http://flipping-car.online/ligodogofifivazubo1r3m4.pdfIn PDF document text
    • http://sodahq.club/wujawikogutasapuzwathw.pdfIn PDF document text
    • http://universityru.fun/737539216098pj79.pdfIn PDF document text
    • http://itverys.space/283752261702mqim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lawijiba.rf.gd/medegaxodojet.pdfIn PDF document text
    • http://jotunozafe.epizy.com/what_are_the_types_of_reading_explain_with_example.pdfIn PDF document text
    • https://9907981b-0bc7-4fd3-a434-169f7cdadf42.filesusr.com/ugd/575363_52a5081d461e4230aae31b9b2a3b954d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/814dd117-51c3-4b4c-afe2-7bee69197498/wirij.pdfIn PDF document text
    • https://2d130471-2a64-48ba-87cf-8f1e86c6acad.filesusr.com/ugd/9c43ec_3ef884b74fb14b4e8a5354e223bef4ff.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a526dbf-55c0-4056-96d4-e0bce2d44584/how_much_sodium_in_taco_bell_taco_salad_with_salsa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb236e5d-214f-4e9a-a554-0118f89660e3/how_to_hack_money_in_gta_5_story_mode.pdfIn PDF document text
    • https://e1ca4115-fb55-43f9-84f1-eaf814f8c83f.filesusr.com/ugd/18122d_adae5a50130346458b58460ac3836c15.pdf?index=trueIn PDF document text
    • http://xuwuxubemepimox.rf.gd/litibidi.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_off000107e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E2 5252 bytes
SHA-256: 957303833527ba7508236de35d83cf12c6be94626ae6ad350cade5d807084b26
font_01_sfnt_off000119cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119CD 10452 bytes
SHA-256: e5cab2afa256d26cb1cf61b4e7452b76d3b6b8f233a128e63066135789c296a1

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