Malicious PDF — malware analysis report

Static analysis result for SHA-256 a45e702097b605d9…

MALICIOUS

PDF

73.2 KB Created: 2021-03-26 10:13:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: c8c78db449e482e75980e8dbbade0ded SHA-1: 458b1589aeede9120db083e09fac6a682ce4deaa SHA-256: a45e702097b605d933c052527cde77b258999a2b578930bdb04ce284bd43f461
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to distribute malicious content or facilitate phishing. The primary external URI, 'https://baarspo.ru/wix?keyword=hobart+c44a+parts+manual', is likely a lure to disguise the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://baarspo.ru/wix?keyword=hobart+c44a+parts+manual PDF link annotation
    • https://nesefutuderixu.weebly.com/uploads/1/3/2/7/132740375/55d047273e0.pdfIn PDF document text
    • https://mekumago.weebly.com/uploads/1/3/5/9/135981587/5729586.pdfIn PDF document text
    • http://gexomafe.mypressonline.com/shop_vac_replacement_parts_lowes.pdfIn PDF document text
    • http://fejukoturig.medianewsonline.com/accelerating_learning_in_active_management_the_alpha_brier_process.pdfIn PDF document text
    • https://futinubub.weebly.com/uploads/1/3/5/3/135328842/menomamid_masuwelivitefo.pdfIn PDF document text
    • https://dulumomotuvubu.weebly.com/uploads/1/3/4/7/134759228/3519866.pdfIn PDF document text
    • https://nokurujifeseg.weebly.com/uploads/1/3/4/3/134355409/4abeef.pdfIn PDF document text
    • https://gariligiradafa.weebly.com/uploads/1/3/4/0/134041078/f21a5a1424002.pdfIn PDF document text
    • https://judexesadizit.weebly.com/uploads/1/3/0/7/130738912/sixadutob-pagoxirok.pdfIn PDF document text
    • http://vizojuzoninunoz.scienceontheweb.net/poulan_p3416_price.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://76b44699-1094-4fd8-8d4a-70b7be8159c3.filesusr.com/ugd/c450b2_7164ca7280294c09ac9385b445b5175f.pdf?index=trueIn PDF document text
    • http://nomamazuzut.atwebpages.com/regions_and_provinces_of_the_philippines.pdfIn PDF document text
    • https://eb40363d-1d1f-4170-a897-f23f0f433116.filesusr.com/ugd/2a1429_2aa54572500442ce85a672acf0d4917d.pdf?index=trueIn PDF document text
    • https://855e1e5b-0daf-4dce-aa73-dfad2bfec5df.filesusr.com/ugd/ced2dc_6297520d3e3849db9d3589ec082c19a4.pdf?index=trueIn PDF document text
    • http://pusapovewazigu.onlinewebshop.net/lee_hammonds_big_book_of_drawing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9a92a16-d7ec-43d8-bbf9-ad62bf3054ef/vijesusiwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a7ac880-8994-4bcc-9fac-f393357d6bd6/how_to_format_hard_drive_on_swann_dvr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f71e651-8450-4969-8628-e1f2edf92dce/wamodogiwebosujejazerowo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b1261ea-4001-4be0-9960-1736a5594f24/tubewigegumuzu.pdfIn PDF document text
    • https://f26e6bca-ce10-4524-9610-ed5ef7c8d48b.filesusr.com/ugd/ac8c68_ee0f4f156a1f447eb5fa0faab30604dd.pdf?index=trueIn PDF document text
    • https://4da44922-6ee1-4515-aed7-54c3d6b51f77.filesusr.com/ugd/243a28_bf5feb7899624c92952a298459ba740b.pdf?index=trueIn PDF document text
    • https://18e99e0c-7034-4a8c-9069-267580a295b8.filesusr.com/ugd/b337f5_90869822f43e4a7aaef4a0480a272d8b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a39107f9-1611-4869-8f0c-110a84901c4d/lugaga.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_off0000df97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF97 5268 bytes
SHA-256: ce46beeea2dbad0d9c5ecae4c5d8ffc3c0d96c413ca9f381a26b5531b41e8bda
font_01_sfnt_off0000f16c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16C 11004 bytes
SHA-256: 205fef8a164c9aeef5151cdcd5ec58f7b32ac4902d791a752a5578c0b02f01d1

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