Malicious PDF — malware analysis report

Static analysis result for SHA-256 678a07854b44c9b6…

MALICIOUS

PDF

101.4 KB Created: 2021-04-02 06:24:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 2fdb14e01ff2612c43abc51faca63889 SHA-1: 5660562a27ff02bb0b82af34c493cf20034be2af SHA-256: 678a07854b44c9b65d714a86a50d1b54d221a0c2ab1e29287031d347dcf1633b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://pelibifir.ru/strik?utm_term=orlando+virginia+woolf+plot PDF link annotation
    • http://ribupisid.22web.org/33362921034.pdfIn PDF document text
    • http://busevabafumoje.iblogger.org/everyday_use_selection_quiz_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420604/normal_602f150c8bd25.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408319/normal_5ff96dada8554.pdfIn PDF document text
    • http://fotogodopuxet.iblogger.org/deformers_trophy_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497079/normal_603519cfd0c80.pdfIn PDF document text
    • http://jojuxidalizoxa.22web.org/43835121540.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovixovuti/Ahw8hfW/ibaco_ice_cream_cake_shop_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/noxibogalu/bhesQ9l/super_dancer_chapter_3_grand_finale_performance.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://uploads.strikinglycdn.com/files/3f674ed5-882c-43e7-9147-b5d7e75a5d86/55399935364.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21fbe8cc-e181-4d8e-bdb9-728962e9911a/23626643062.pdfIn PDF document text
    • http://femikadin.epizy.com/levenukekuz.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/wirinufeven.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/bimazowat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fdd164c-ccc1-4d3e-95eb-a9398745379b/echo_cs_400_parts_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c07530dc-3945-4ca9-9c78-492fbe3746fc/junuruxogegagejidusewod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce04a520-f375-4f64-8178-fb3b6d073411/84667885217.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41f7d689-ebe1-4d67-ae15-474af2587009/how_to_record_dividend_expense.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/android_data_recovery_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/bodybuilding_bulking_diet.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/how_to_make_a_triangle_in_photoshop_cs3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59b9c0f2-f708-483b-8d30-3fb355978379/bodybuilding_arnold_schwarzenegger_videos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77631494-4cc5-4ab9-9c65-32bd53aaa683/tulipilupag.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001441d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1441D 4880 bytes
SHA-256: 00a35baa58e7008c934f8a6fc239b700713ef37df6a85b2eed27a1fe6a58605a
font_01_sfnt_off000154d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154D1 11236 bytes
SHA-256: 2d1e1280383cc46efc84e6a9e665139c8855bb69137f3b239e9b88bd4ee9300e
font_02_sfnt_off00017a19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A19 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176