Malicious PDF — malware analysis report

Static analysis result for SHA-256 19e9c52ee63d8b4b…

MALICIOUS

PDF

67.4 KB Created: 2021-03-17 20:44:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 854a2b0bc74cacdf489bd4860884c58a SHA-1: 776162b75a68cd6e0d6de3888deacede115a6bfa SHA-256: 19e9c52ee63d8b4b810db451dea674c2ae2042addfb9225be28b4ed4de7b645f
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, identified as a link farm, likely intended to manipulate search engine results or redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically a phishing or trojan distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a mechanism for delivering further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://resalured.ru/award?keyword=analisis+data+penelitian+kualitatif+burhan+bungin+pdf PDF link annotation
    • https://cdn.sqhk.co/musutalivun/iyjgjid/81674166528.pdfIn PDF document text
    • https://zizusufake.weebly.com/uploads/1/3/4/6/134646877/fagofe-loxiwufi.pdfIn PDF document text
    • https://betetudiju.weebly.com/uploads/1/3/5/3/135348010/wujopixaru.pdfIn PDF document text
    • https://cdn.sqhk.co/gunakawujo/i7agjgc/59867288328.pdfIn PDF document text
    • http://xujilutobidiko.iblogger.org/niluwojoferimezubarobew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417643/normal_6029a7b5cc4a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377101/normal_604ae3227a55c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393189/normal_60111a4da808b.pdfIn PDF document text
    • https://cdn.sqhk.co/xibidodoko/nejhcid/best_offline_music_player_for_iphone_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c6111751-42b6-464f-a8b1-832d492ff999.filesusr.com/ugd/3d0627_3d9bdd5a4442483694c28a00fd552d4f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ad01142-655f-47e3-97d5-600cef569c78/22412081201.pdfIn PDF document text
    • http://widojedup.epizy.com/magnetic_actuators_and_sensors.pdfIn PDF document text
    • https://02274cc9-8b57-4441-be19-e46c089ec46b.filesusr.com/ugd/f11b8f_a1d8970b4af64f6f9292455bc2165ed6.pdf?index=trueIn PDF document text
    • http://xaralitotido.rf.gd/guidelines_epo_ranges.pdfIn PDF document text
    • https://c1e70603-6ca1-47bc-880b-b60d7d434995.filesusr.com/ugd/df625d_f8d830765f744d15927f51bbdca89dde.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/36441344-63d2-4a99-b09b-22d10836fb61/how_to_reset_braun_thermoscan_6020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f2c91e1-e8a5-4704-b210-1944a615f7ed/accu_chek_aviva_plus_meter_discontinued.pdfIn PDF document text
    • https://9df6fdd8-df71-43fb-87ad-b121b2de7416.filesusr.com/ugd/e0d0cf_3e6bf03c23f3404ab7c442f7c2c41699.pdf?index=trueIn PDF document text
    • http://besogigususatu.epizy.com/garmin_mapsource_malaysia.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_off0000c94d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC94D 5496 bytes
SHA-256: ab06f186143764da8e0b378aeeebfb42e9035249a7fd665192a746dd2b5f7cae
font_01_sfnt_off0000dbf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF2 9888 bytes
SHA-256: fcabef09d4f300ddcf034934d79c8e33398e9f15d9b556c1ae10fcb34414eb06

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