Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d95e717381da06f…

MALICIOUS

PDF

142.1 KB Created: 2021-04-03 20:09:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: fc064a2ee4b35faaa2a7799500bd75d9 SHA-1: 5520720d03784aa59a447f5984f8b3e918807ecc SHA-256: 3d95e717381da06f4e10fd2a89e459dd5382dcefbea9304d8f7909f4d21f1b0e
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 0.9994

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://maypoin.ru/wix?keyword=manual+muscle+testing+shoulder PDF link annotation
    • http://rmk4sale.xyz/use_of_binder_in_androidfbihi.pdfIn PDF document text
    • http://msertis.xyz/how_to_hair_color_removerhcsap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407991/normal_600aac05e894d.pdfIn PDF document text
    • https://motanaweda.weebly.com/uploads/1/3/4/3/134316912/pimumobi_jadijimozomol_kuvuvatugox.pdfIn PDF document text
    • http://datab.vip/17253462756i9w32.pdfIn PDF document text
    • http://car-test.pro/881103286323z556.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365636/normal_601a3e1dccac9.pdfIn PDF document text
    • https://turudesufexo.weebly.com/uploads/1/3/4/1/134131379/notob.pdfIn PDF document text
    • http://workmonster.net/ejercicios_ortografia_literalb1vzp.pdfIn PDF document text
    • http://pasetbs.xyz/13609225350xkzqw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417990/normal_5feee54707af9.pdfIn PDF document text
    • https://jemiwuwavaza.weebly.com/uploads/1/3/0/8/130814288/nunofenumu_vuzukivikebe.pdfIn PDF document text
    • http://consumer-data-protection-bureau.com/kebatifopotujodirufarejosaztb1.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/wujodibu/gastroenteritis_infecciosa_aguda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efebff1c-ecde-4705-9a00-3250e36166b3/juvudot.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/dummy_admit_card_10th_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3df1842d-3431-4872-b112-c40dd40b23e3/can_you_die_in_layers_of_fear_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15f5ae9f-0fb9-49e7-81a7-25c58bd97c03/lg_oled_55eg9100_review.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001d9d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D9D1 5356 bytes
SHA-256: 8bebfa06d419d7e064ee734a8240dea4ff64d2620e8004620052cbaf3c004b99
font_01_sfnt_off0001ebe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EBE4 11752 bytes
SHA-256: b1681ec421a732b777363993fde155fcf97f26b2cc958fa9949876336c3eb7c9
font_02_sfnt_off000213d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x213D9 16136 bytes
SHA-256: c87c393f8feb9bd06c25d3a16c502a6f65d18ae303a0906b1dcac3969fb1ef03

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