Malicious PDF — malware analysis report

Static analysis result for SHA-256 1368c92790641c1c…

MALICIOUS

PDF

75.4 KB Created: 2021-03-01 12:34:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 1a0171838a378b9886d7dada48f505ba SHA-1: 12e147c8b41d42ee7aeaa57c94ac33167224bcf1 SHA-256: 1368c92790641c1cab48ecb5587794d84d349267436463b7f8ef7cfa1111a8cf
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains multiple embedded URLs, with one specifically pointing to a link farm on disposable hosting, suggesting a lure to external malicious content. The PDF structure and embedded URLs are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/award?keyword=john+deere+lawn+tractor+service+near+me PDF link annotation
    • https://xososikanezav.weebly.com/uploads/1/3/4/8/134892973/9030256.pdfIn PDF document text
    • http://torchqbfl.fun/how_to_become_a_specialist_physician41cwh.pdfIn PDF document text
    • https://mivujekosos.weebly.com/uploads/1/3/1/6/131637271/dusosal.pdfIn PDF document text
    • http://bathforlegs.xyz/47095781138ddh6x.pdfIn PDF document text
    • http://dnepr24.info/opposite_word_in_hindi_download2a81r.pdfIn PDF document text
    • http://reduslim-shop.website/dopopodukb66e.pdfIn PDF document text
    • http://wugafis.66ghz.com/bed_sheet_sizes_in_meters.pdfIn PDF document text
    • http://9gusevshop.space/kuzovrsms9.pdfIn PDF document text
    • https://fobewesepujub.weebly.com/uploads/1/3/2/3/132303403/5591258.pdfIn PDF document text
    • http://liketsven.xyz/gomasaxatia3re8.pdfIn PDF document text
    • http://cabinetsop.xyz/where_does_totin_chip_badge_go_on_uniformw9fb4.pdfIn PDF document text
    • https://bososotozakep.weebly.com/uploads/1/3/1/4/131437593/tenap.pdfIn PDF document text
    • https://zemaxixose.weebly.com/uploads/1/3/4/6/134636511/megepokonelaf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pakoxerevigere.epizy.com/pivanopolamejamulatoz.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/can_i_get_metal_gear_solid_4_on_ps4.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/xunapugasizikigizaf.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/dezodogotuwewemudeko.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_off0000ea27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA27 5320 bytes
SHA-256: 6b3d16d8474f7f8b3d030944759ce08b8ef7396dde9c7a9c666b47343fd4d62d
font_01_sfnt_off0000fc28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC28 10476 bytes
SHA-256: 2248329cc8ed2694439dac8cfcf1fd6f46a22499e7806e6c6142cd5293e08f88

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