Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcf2042ef65837f2…

MALICIOUS

PDF

91.2 KB Created: 2021-03-12 21:21:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 204b8660e17e7f481a5fcb054b172bf1 SHA-1: b2d1229b16e23a99d052ac05138b880448b84ef6 SHA-256: bcf2042ef65837f2baffc2b48f79006275e13f3c9b6c298d89385311aea97e7b
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 0.9993

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 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://botokaw.ru/strik?utm_term=samsung+galaxy+s9+plus+price+new PDF link annotation
    • https://lotekine.weebly.com/uploads/1/3/1/3/131381428/falazizexigifonegom.pdfIn PDF document text
    • https://penomagara.weebly.com/uploads/1/3/2/6/132695387/7199253.pdfIn PDF document text
    • https://xidabasexibure.weebly.com/uploads/1/3/1/6/131637276/105dc.pdfIn PDF document text
    • https://devatokur.weebly.com/uploads/1/3/2/6/132683056/c437f82.pdfIn PDF document text
    • https://serijarivak.weebly.com/uploads/1/3/0/7/130776739/2590607.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a1d3e036-d9a1-4be1-9d2f-eedbb581cb22.filesusr.com/ugd/3ce946_af8dd89facb844f4a3ddeb88b92f365b.pdf?index=trueIn PDF document text
    • http://bukarujinadir.epizy.com/bodybuilding_pics_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/natiz.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/35641466367.pdfIn PDF document text
    • http://nokafifebezazo.rf.gd/83524985591.pdfIn PDF document text
    • https://48cc712b-de5e-493e-a198-f8962849e22b.filesusr.com/ugd/d2751c_b0bdccc853874aa39826fbe2f3279a15.pdf?index=trueIn PDF document text
    • https://9907981b-0bc7-4fd3-a434-169f7cdadf42.filesusr.com/ugd/575363_1aca939f6b1745f899c423db879e9584.pdf?index=trueIn PDF document text
    • https://204833c8-abda-4421-8777-5048ee7dd919.filesusr.com/ugd/e30b7a_2672b139e11146deb47b32e3fb12b3bb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wupuxus/64274795162.pdfIn PDF document text
    • https://s3.amazonaws.com/rirusozo/honda_power_washer_oil_change.pdfIn PDF document text
    • https://1f2f8e77-98df-4c5e-b88a-83bc2b612b58.filesusr.com/ugd/5c7528_4f2298f489434ea9b938fc62c44eb205.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mulerux/limits_of_trigonometric_functions_worksheet_doc.pdfIn PDF document text
    • https://5ac9d038-517d-4536-97f6-676423289421.filesusr.com/ugd/b444d4_7a2717f988a142ddab3bdc252ecdb30e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/77651731346.pdfIn PDF document text
    • https://8c1dc56a-a131-4b43-acff-3635b9115217.filesusr.com/ugd/90423f_5c65d680148346c9a902c0d39d7ee8f4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/30732469555.pdfIn PDF document text
    • http://lanikudawojag.rf.gd/17991010689.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/bmw_m4_automatic_or_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/sony_a5100_manual_settings.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_off00012360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12360 5776 bytes
SHA-256: 11db03078f9f8b2950a9568428524bbbc8fe6e0d850449f414af6728f7a4e00a
font_01_sfnt_off0001370d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1370D 12360 bytes
SHA-256: c792898934c4903032e5421f51c169f3ab77347aa0b1784c6d2b8e1bec0d7fa6

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