Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0c4e231495f0491…

MALICIOUS

PDF

82.7 KB Created: 2021-04-26 02:44:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: ec8c06b8ac9fe505147ec323ca281610 SHA-1: 2b7c39f656a0968878d8587ede4e5427222257c3 SHA-256: c0c4e231495f04913254dc80a06c3d53a48dbe5b161f0ee3c0add232379456df
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 detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with one prominent URL pointing to 'resalured.ru', suggesting a redirection to a malicious site. The document body, though heavily obfuscated, contains text related to product reviews, likely serving as a lure.

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://resalured.ru/strik?utm_term=singer+simple+3223+reviews PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459323/normal_60683a3a5116f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392871/normal_600b4f4c98a6c.pdfIn PDF document text
    • https://xezafeliwi.weebly.com/uploads/1/3/1/3/131381443/7262213.pdfIn PDF document text
    • http://francobusiness.com/rem_700_stock_upgrades1uw1j.pdfIn PDF document text
    • http://basofeveku.iblogger.org/asnt_level_3_study_guide.pdfIn PDF document text
    • https://befunopokoxa.weebly.com/uploads/1/3/5/3/135327779/1d8de16debb.pdfIn PDF document text
    • http://salearea.pro/andantino_sheet_musicssic2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465537/normal_602af854c4a74.pdfIn PDF document text
    • http://streichpack.online/19158471665631gu.pdfIn PDF document text
    • https://cdn.sqhk.co/daxerarugak/jgphjaF/adventure_academy_promo_code_entry.pdfIn PDF document text
    • http://tevfikyuce.xyz/the_captive_lady_summaryr81at.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481675/normal_600eff34c2a60.pdfIn PDF document text
    • https://jetosiwer.weebly.com/uploads/1/3/4/7/134767378/famovoletida.pdfIn PDF document text
    • http://xawapose.22web.org/bestwap._in_movie_2018_free.pdfIn PDF document text
    • https://cdn.sqhk.co/nizivatitogu/gjjh7ge/33545213320.pdfIn PDF document text
    • https://cdn.sqhk.co/savunowudob/gJ4qGiU/77767945505.pdfIn PDF document text
    • http://usecabinets.xyz/variety_show_x1_flash_sub_indo96axn.pdfIn PDF document text
    • https://petovowatudero.weebly.com/uploads/1/3/1/6/131606592/tavonojubawinip-vatipu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456166/normal_600c1a8abbbdc.pdfIn PDF document text
    • https://cdn.sqhk.co/pepupiribojo/atbhaRf/ranefifinujovobopojuwipa.pdfIn PDF document text
    • https://filavemegu.weebly.com/uploads/1/3/4/8/134883773/9c08861.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/vatosolikijike/gibib.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/mike_byster.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/mivekemikexiravo.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/verbs_worksheets_for_grade_1_and_2.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_off00010496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10496 5480 bytes
SHA-256: 566a8e0bfa5be8fc7acaa1477073a5657241d4db8f4b342497448c04fae4cb7f
font_01_sfnt_off0001173b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1173B 10784 bytes
SHA-256: 1f6227232fb765ab6ca8c9ab604dedc2bdbe668f5fd6d162dcf2502a58ac1f7e

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