Malicious PDF — malware analysis report

Static analysis result for SHA-256 c340d9e249bcb919…

MALICIOUS

PDF

86.8 KB Created: 2021-04-17 22:43:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: fac3f2f3e9e81a7427dc0e2b64db3f68 SHA-1: 569e604978632702f7ecbcce32963b9ddb7b0780 SHA-256: c340d9e249bcb9196ffbc940a63e06abb3a973b4398b6d4eb5ec2bf0da150d77
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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://gimoguvi.ru/strik?utm_term=pentair+superflo+1.5+hp+specs PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4445532/normal_5fc9a19dad0eb.pdfIn PDF document text
    • https://cdn.sqhk.co/netimawifes/dhiiA1z/moto_x3m_bike_race_game_y8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388814/normal_6004da344ea65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457298/normal_6056aff777ea9.pdfIn PDF document text
    • http://bettermoneytips.com/65847285776st7wg.pdfIn PDF document text
    • https://cdn.sqhk.co/kezinujus/ujdKihk/disney_customer_support_jobs.pdfIn PDF document text
    • http://lewijufe.sportsontheweb.net/noun_pronoun_adjective_adverb.pdfIn PDF document text
    • http://fortuneo-enligne.com/echo_weed_eater_string_stuck_insideyrbwi.pdfIn PDF document text
    • http://xawamiwupajev.mygamesonline.org/how_to_draw_a_equilateral_triangle_using_a_compass.pdfIn PDF document text
    • http://lnstagram-helps-contact.com/24764338907jdd0o.pdfIn PDF document text
    • http://bt-management.website/461352147374fw3v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471467/normal_606a9e6dd700b.pdfIn PDF document text
    • https://cdn.sqhk.co/pimidima/jLgcRia/samsung_family_hub_refrigerator_2020.pdfIn PDF document text
    • http://kifejuja.medianewsonline.com/zonof.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401989/normal_5fcd629220568.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387421/normal_6046365887bd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493549/normal_604ce6b36dcdb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366947/normal_5fedc1b4200ac.pdfIn PDF document text
    • http://help-business-media.com/105962834879a275.pdfIn PDF document text
    • http://nodefiw.medianewsonline.com/jazoxasenagasadoxu.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/gelawiweza/ergo_omni_360_front_facing_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/how_to_review_photos_on_facebook.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_off000111a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A2 5312 bytes
SHA-256: 70b6b17c7ac00d12378bd0ae0dba9315c11b508aafba8f44eecfab1bd33d545b
font_01_sfnt_off000123ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123BA 12384 bytes
SHA-256: 7ed37ed20cc9cb528ec9660c2a7c1f15ef27045d38c48d1179efdd33344a5865

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