Malicious PDF — malware analysis report

Static analysis result for SHA-256 86d5ec367422175d…

MALICIOUS

PDF

79.8 KB Created: 2021-04-07 01:24:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: d680bbcd520ec26efdb991f4746d1675 SHA-1: 1c837062e1bc3291b1d3409e000ca67a058b3bb6 SHA-256: 86d5ec367422175df40255c47bf3186c2025105863ffb420a5787a8079c0bda0
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting an attempt to manipulate search engine rankings or distribute malicious content. The ClamAV detection and ML classifier further indicate malicious intent, specifically classified as a phishing trojan. While no scripts were directly extracted, the structure and numerous external URLs point towards a phishing or content-farming attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://pelibifir.ru/strik?utm_term=badass+body+diet+recipes PDF link annotation
    • http://rugozuravonabib.22web.org/2014_buick_verano_owners_manual.pdfIn PDF document text
    • https://susominen.weebly.com/uploads/1/3/4/7/134714937/a7af1.pdfIn PDF document text
    • https://seporarutigofu.weebly.com/uploads/1/3/2/7/132741198/repadurawozup_sifukufe_kirefutikataf.pdfIn PDF document text
    • https://morogixifidogaj.weebly.com/uploads/1/3/4/4/134497599/c6957cb22.pdfIn PDF document text
    • https://niromegezos.weebly.com/uploads/1/3/2/6/132681660/gukivutixavit_pozamepe_pixubex.pdfIn PDF document text
    • https://filudatobo.weebly.com/uploads/1/3/2/6/132681654/7527425.pdfIn PDF document text
    • http://kapewodepobigab.22web.org/how_to_make_a_circle_graph_in_powerpoint.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
    • http://bexiponezewan.rf.gd/teaching_literature_approaches.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/anari_number_1_full_movie_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/13409052491.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/how_to_repair_a_kitchenaid_refrigerator.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/67200531339.pdfIn PDF document text
    • http://lujopuz.rf.gd/25066726629.pdfIn PDF document text
    • http://lejaxofin.epizy.com/vagabat_gita_bengali_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4a515aa-523b-489e-9c4b-5b49aabe2719/how_to_play_midi_keyboard_without_computer.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/accu_chek_aviva_connect_bluetooth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c660ffe5-e6e6-4fa7-9165-53a8be858ea0/why_cant_narcissists_feel_empathy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f5fec91-9387-457a-be80-daf7b718ed36/91889980237.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/spine_mri_report.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/1017004182.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/the_history_of_literary_criticism.pdfIn PDF document text
    • http://tegiledo.epizy.com/xifidugurunumorumeretoli.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_off0000eeb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB5 5008 bytes
SHA-256: a6efc22e4935a709a7a6aec10dc4bde974a031016e869e78067eec54a6b4be21
font_01_sfnt_off0000ffd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD0 10448 bytes
SHA-256: cb475c70ad87b9a3341833f1dc251af81759e1881ec8ccb2f94efb633c7815af
font_02_sfnt_off0001234f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1234F 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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