Malicious PDF — malware analysis report

Static analysis result for SHA-256 357706a1b136bcc3…

MALICIOUS

PDF

86.0 KB Created: 2021-03-25 08:25:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5eaecebec1140da10dfa7161fae480b2 SHA-1: 942f141b6ba42fc039239cc60c2c933a92f21fec SHA-256: 357706a1b136bcc350ed0a6a4881ba045d1437ec4fae50304699df5ccef23e7f
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=panasonic+rice+cooker+manual+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459468/normal_603d8a1635fdb.pdfIn PDF document text
    • http://pinerapidsrr.com/wii_forwarder_channels_downloadoyhqb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489259/normal_5fdb594a05bbc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366947/normal_5feb158b2e692.pdfIn PDF document text
    • http://zhigina.ru/how_to_charge_flutterbye_fairytntvx.pdfIn PDF document text
    • http://kapovulup.mywebcommunity.org/zutofirituvub.pdfIn PDF document text
    • http://clientesdkb.com/what_are_the_5_survival_needs_of_the_human_bodytx0c8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375344/normal_5feb4b7ba7adc.pdfIn PDF document text
    • http://widonatozeg.mypressonline.com/39118349076.pdfIn PDF document text
    • http://idealica-italiaoficial.site/active_and_passive_voice_exercises_for_class_7_online2wlia.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://01dc7cc6-b8ed-446e-8cc8-1ad78882ed38.filesusr.com/ugd/e23fbb_a769e79e45dd43e3b56e398fb6d853f3.pdf?index=trueIn PDF document text
    • https://cf2e1f24-e5f1-4289-9567-3affce9c164e.filesusr.com/ugd/a4ea6c_293b49bc8ffb4d6584fd0036caff635a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/jokinedizinijuxoxebatove.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromisixinolib/40764457612.pdfIn PDF document text
    • http://wozimape.onlinewebshop.net/furomulow.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/how_to_subpoena_bank_records_in_south_africa.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/daxod.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/what_is_the_first_paragraph_of_the_declaration_of_independence.pdfIn PDF document text
    • https://87164119-88a6-4d6d-a72f-b109cf2d88b9.filesusr.com/ugd/bd0a66_61e19a744b5f446f8574905a5e597395.pdf?index=trueIn PDF document text
    • https://27420876-d215-4860-9a72-f48db0d0c320.filesusr.com/ugd/4062c2_dca9963ed78a485e8ce760a919b75394.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/customer_feedback_sheet_for_restaurant.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/20585617292.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/kesaxozanesewegutij.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_off0001047a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1047A 5168 bytes
SHA-256: 71a7a1897fd477c7684aca91549cc138266f2e259e4ee5083d034eb27dc18a5e
font_01_sfnt_off000115e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115E9 11108 bytes
SHA-256: c74858c6bff1a4237d6072d014168b59af9fc22b5ddf8d67abac0b277b55bd9c
font_02_sfnt_off00013bf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BF4 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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