Malicious PDF — malware analysis report

Static analysis result for SHA-256 57fa896d802c3a4c…

MALICIOUS

PDF

77.9 KB Created: 2021-03-24 19:33:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1b4358b66ae5c9afa9af2204bfb4106a SHA-1: 87acfb9c10f1f0b5c06f70b3a2cb40d0c04f1447 SHA-256: 57fa896d802c3a4cd8f80607ab2c84522ae690713bdd023263dae6665ea86125
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 0.9997

Heuristics 5

  • 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.
  • 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://crophysi.ru/wix?keyword=memphis+michigan+library PDF link annotation
    • http://xojitupozoded.22web.org/51522510418.pdfIn PDF document text
    • https://cdn.sqhk.co/gixelotopa/Uhjicgh/sql_format_date_time_to_date_only.pdfIn PDF document text
    • http://bezerojiw.scienceontheweb.net/pozimotujuxaja.pdfIn PDF document text
    • https://cdn.sqhk.co/gilubibawi/hibdLDR/rush_rally_2_multiplayer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a680e87d-b0b1-4c9f-ab87-637fa0a28591/manesiladagojub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66181aac-ab16-4986-865c-2d152e7d4805/8498029587.pdfIn PDF document text
    • https://s3.amazonaws.com/befafuni/how_to_apply_a_vinyl_decal_to_your_car_window.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c79e346-c3ad-45d9-8d9a-eeeaf759f2ee/onkyo_tx-nr535_factory_reset.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/62641734295.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/ap_chemistry_cliff_notes.pdfIn PDF document text
    • http://neveket.epizy.com/cardiopathie_et_grossesse.pdfIn PDF document text
    • http://puderumito.rf.gd/97121812218.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e56c472d-5130-4b0b-9a89-3e145a83ebc4/masedafopipezonex.pdfIn PDF document text
    • https://s3.amazonaws.com/fonibinaraj/jio_phone_play_store_install.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ccfa371-15fa-4213-bd0e-9541846ef34c/gusixilakarezuwelixanala.pdfIn PDF document text
    • http://famefikapipu.epizy.com/guide_michelin_restaurants_ile_de_re.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8377d03-59dd-42bf-8386-9b3b6ad81238/what_is_the_difference_between_vitamix_5200_and_5300.pdfIn PDF document text
    • http://fijukarevi.epizy.com/66621647087.pdfIn PDF document text
    • https://s3.amazonaws.com/falejogajir/butesenuvipapepefenumazeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af9ea9e6-2547-4c08-a5fb-9ebbf5b0b306/34146146599.pdfIn PDF document text
    • http://sudexixurijaxoz.atwebpages.com/sisenaxenabitolukewu.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_off0000f04a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04A 5592 bytes
SHA-256: 96f9badfcaebc6aebc9ec486f6a8629b9d2c604c48186d76d522b9a21ec81ab2
font_01_sfnt_off00010335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10335 11068 bytes
SHA-256: 92cb937717bf49c4be03d3178cf87b0d5538dcc99c0c3f28564949d0576ee982

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