Malicious PDF — malware analysis report

Static analysis result for SHA-256 a96c7f306ddcd5e8…

MALICIOUS

PDF

90.9 KB Created: 2021-04-12 20:00:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 062ef1f4015b25543778fa5e23279abe SHA-1: b060b640077cb99c84b7ef9e5eca1705e5e4e7b9 SHA-256: a96c7f306ddcd5e8767e9b9c4b8ce7172a8182009a9163183c2d043fa5e1b3ce
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 0.9975

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/strik?utm_term=drinkwell+pet+fountain+motor+replacement PDF link annotation
    • http://nadefememidep.medianewsonline.com/case_files_emergency_medicine_4th_edition_free_download.pdfIn PDF document text
    • http://duwelizub.mywebcommunity.org/jorumur.pdfIn PDF document text
    • https://cdn.sqhk.co/tibatojo/dk4pBid/dominos_voucher_2020_october.pdfIn PDF document text
    • http://pipavinekiga.mywebcommunity.org/bleak_house_book.pdfIn PDF document text
    • http://gratoraama.space/69207067500o3dvw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410952/normal_5fe965a9e310d.pdfIn PDF document text
    • http://rapoxarawiwalo.sportsontheweb.net/atomistique_s1_cours.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480579/normal_60665ecc25072.pdfIn PDF document text
    • https://cdn.sqhk.co/gabisolovima/id5gjq3/clueless_cast_now.pdfIn PDF document text
    • http://reassurez-moi-fr.info/public_education_and_democracy_quotesn57nb.pdfIn PDF document text
    • http://robot3.site/22_oxidation-_reduction_reactions_practice_problems_answersigszs.pdfIn PDF document text
    • http://profyhouse.ru/nuwikenufajufupubalici8gw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425255/normal_5ffb1fe7c99b1.pdfIn PDF document text
    • https://cdn.sqhk.co/sovajepuxe/hhjcPEN/horizon_credit_union_colville_phone_number.pdfIn PDF document text
    • http://instapriz.site/13254048495bau7o.pdfIn PDF document text
    • http://fajasated.mywebcommunity.org/bise_lahore_9th_class_gazette_2020.pdfIn PDF document text
    • http://samettemiz.xyz/kobosomeruzowodiwapifcj3mj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369525/normal_5fe8e82ad58cd.pdfIn PDF document text
    • https://cdn.sqhk.co/reparepoki/gBCdifD/skulduggery_pleasant_wikia.pdfIn PDF document text
    • http://shop-kid-toys.online/battle_royale_games_no_free0i13c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494139/normal_606d6656158e7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdb53ace-3f3f-41e1-823e-0ecf3add8ba2.filesusr.com/ugd/47e9e0_34d0e51bfb9e47a3b0a4cc6b3737e509.pdf?index=trueIn PDF document text
    • https://c9977776-9e37-4432-9eae-e541147807da.filesusr.com/ugd/bb6cc6_6769e4f1debb4419aa9896a4bf66caf5.pdf?index=trueIn PDF document text
    • https://09d7e2b9-79a3-4876-9e00-73a1ba4263a4.filesusr.com/ugd/92fcd7_eee43beca3eb4aa9882ae7c6ed6620ac.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E1 2952 bytes
SHA-256: e211f2d6e0d1bf1fd17bd5150bc2724fb7c0f1d37b1c69b855d9dcad8de34ab0
font_01_sfnt_off0001006f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1006F 5136 bytes
SHA-256: f49bb4579fbcb5cf8aec1942a45dc02227d0ce0490a4aa36875e388501645b1c
font_02_sfnt_off000111ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111EA 3396 bytes
SHA-256: e20a1ed07453cbb6cc0cb8d9bcae218317134d31a1f14a913302d60522bef6b3
font_03_sfnt_off00011f35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F35 11192 bytes
SHA-256: b9e5717504b28f5d45f523b6256ad1c08e951aa8a3ea24cac1ee98a8fdeefd4d
font_04_sfnt_off0001455d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1455D 16784 bytes
SHA-256: 2c3017c691b20d850761bea11dc4b00c970b17a430209356582ee2abaaf9a3fc