Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a25ff1688c4d3b1…

MALICIOUS

PDF

102.1 KB Created: 2021-05-13 15:14:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c31cc0e566c50b8c8dccc2ff9f6e9f61 SHA-1: ddcfc7170486547da715ff6f78cfc8ce49a2bc9a SHA-256: 7a25ff1688c4d3b1b4e8a21faab4c2510eb556fed45bbfbcbea8242652586e9b
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://baarspo.ru/strik?utm_term=hampton+bay+300+watt+transformer+manual PDF link annotation
    • http://boothattendant.com/351978817525hl6b.pdfIn PDF document text
    • https://cdn.sqhk.co/komajekolino/2YtdKc8/26015007177.pdfIn PDF document text
    • http://gloslides.com/baruperyna3i.pdfIn PDF document text
    • http://help-feedback-amzn6.xyz/97747660698ikv15.pdfIn PDF document text
    • http://pubgucbayim.com/nintendo_wii_console_price_south_african5mfq.pdfIn PDF document text
    • http://dvertsoff.ru/jupibigipakomarepaz4wlbn.pdfIn PDF document text
    • https://cdn.sqhk.co/guwezasov/fWhanVo/stunt_bike_tricks_master_extreme_trial_stunt_game.pdfIn PDF document text
    • https://cdn.sqhk.co/podoxato/iYQhgia/birthday_decoration_ideas_at_home_for_dad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456143/normal_5fe5ae80a702b.pdfIn PDF document text
    • http://erethiztzj.space/how_to_find_distance_from_velocity_vs_time_graphqs6y3.pdfIn PDF document text
    • http://discount50it.pro/navy_enlisted_eval_brag_sheettpdy7.pdfIn PDF document text
    • https://cdn.sqhk.co/juvebuzizej/vuY2ib7/meezan_bank_car_leasing_calculator_pakistan.pdfIn PDF document text
    • https://cdn.sqhk.co/telazaje/jbjbMjb/57611195689.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469831/normal_606983e53a6c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408319/normal_5ff96c7c9543b.pdfIn PDF document text
    • https://cdn.sqhk.co/dedejosewor/ggixEgi/75936110220.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://b19b3b79-9ae2-4e99-9b16-ef32671d60f4.filesusr.com/ugd/0bc867_aa8eb2527071423d996d7389a0a948a5.pdf?index=trueIn PDF document text
    • https://7ef5d8b8-74ac-4e0a-b0a0-fa61ca6462a8.filesusr.com/ugd/23e9be_b811ef9557cf449cbdff5e44cfee0461.pdf?index=trueIn PDF document text
    • https://8271b8e8-1520-4b18-8785-2fafc8cd33e6.filesusr.com/ugd/efc97f_f41f97f94fef44fcbfa935f8e476f701.pdf?index=trueIn PDF document text
    • https://74269c25-1731-4359-90d4-804f54ef9c1c.filesusr.com/ugd/b5973a_c683c34c8ce04be880db9472d3347d20.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001410b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1410B 5484 bytes
SHA-256: 582f0f17b173ee95d248f4679d5a8024ec3bd7d3e99414377419fec1653ad50d
font_01_sfnt_off000153a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153A4 12492 bytes
SHA-256: 2c8de307819059e4f3a107d6dc001f44358db0163c406a45cf5b205e3bc8b208
font_02_sfnt_off00017cc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17CC4 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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