Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5f43b7b34b95323…

MALICIOUS

PDF

82.3 KB Created: 2021-03-21 02:52:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 928bf2e8578c4b15beebf7e6e4b4f356 SHA-1: db2aabe68289c0f5a5cdb53101be983d6d17b0dd SHA-256: e5f43b7b34b95323b7d3aad4d8ddb77d569bb4c2ae8691de207072f0592b7a91
156 Risk Score

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 0.9961

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://midufefew.ru/wix?keyword=our+world+walking+dead+cheats+ios PDF link annotation
    • https://cdn.sqhk.co/devisofage/fDCidDl/mandala_coloring_pages_printable_animals.pdfIn PDF document text
    • https://guxumexowe.weebly.com/uploads/1/3/3/9/133999944/dbc18521c6a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451750/normal_602edeb1213cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489263/normal_604d989f17453.pdfIn PDF document text
    • https://cdn.sqhk.co/pedajobu/j24ji34/how_to_win_friends_and_influence_people_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371014/normal_604e5975e61a3.pdfIn PDF document text
    • https://soxoxalumowaju.weebly.com/uploads/1/3/4/7/134768556/dununimoxaveg_kewosofusa_dusun_kezusozafaga.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425727/normal_6005a98460e73.pdfIn PDF document text
    • https://kewekekonuv.weebly.com/uploads/1/3/4/7/134732265/5283321c87e2a3c.pdfIn PDF document text
    • https://cdn.sqhk.co/porodiwaten/digibhg/story_mode_divinity_2.pdfIn PDF document text
    • https://cdn.sqhk.co/kubasovusi/e2gethc/tamaraje.pdfIn PDF document text
    • https://mazifufozabi.weebly.com/uploads/1/3/4/6/134690202/56328.pdfIn PDF document text
    • https://cdn.sqhk.co/gevagedubop/jaifgfF/figaratekuvamozonino.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469836/normal_6011a29484423.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/rufonali/usb_cable_wire_color_codes.pdfIn PDF document text
    • https://7fad2989-91b8-457c-89bc-9a0e7aeef19f.filesusr.com/ugd/b03ff3_e59c240c307d42d6bbee2d187ec834f1.pdf?index=trueIn PDF document text
    • https://4993f9ff-345c-4c03-a8ec-d4f8dac664d6.filesusr.com/ugd/debbe1_f10393f3899b490c902c91c796bf4d8e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/how_great_thou_art_lyrics_framed_art_print.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/stative_and_action_verbs_list.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/14414837534.pdfIn PDF document text
    • https://109d6476-c6f4-4eee-b84c-907698fb4207.filesusr.com/ugd/0d7ebf_116e39527d9c48298ef5d75d6ed819f4.pdf?index=trueIn PDF document text
    • https://8e8ef6ac-913c-489f-8395-c30730e7ba0a.filesusr.com/ugd/f39c52_835c0926652f4da59b8b281e9f98a364.pdf?index=trueIn PDF document text
    • https://0298dc5a-7924-4276-8279-06452a5288da.filesusr.com/ugd/b30cf0_ce6ced1e491843ecb17c1ff649eedb0d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/2005_vw_beetle_transmission_fluid_type.pdfIn PDF document text
    • https://s3.amazonaws.com/toniseligiwuzux/banidugelibejal.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/que_la_rentabilidad_financiera.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_off00010204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10204 5384 bytes
SHA-256: 4a7cde6da7d43c89e564a55a0b59fe6b50fc59de932ff6599002b19b8ab9da81
font_01_sfnt_off0001145e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1145E 11008 bytes
SHA-256: dba9d4befd2406a74aa877a5d938925f843ef07411995f74156a8dc99d075d1f