Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c0b7872bf2b95bf…

MALICIOUS

PDF

79.7 KB Created: 2021-04-09 21:00:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3bbc85a88cfade0fbf66cc5a50744c92 SHA-1: 8f10fe7319d49fb73b0783534ae4659f7f252b54 SHA-256: 0c0b7872bf2b95bfbd4c9468ede07a63cbdd1db3edc8d876375b415f18b1a3fb
134 Risk Score
Tags
free-cdn-ebook-manual-lure

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. It uses an invoice-themed lure. 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 0.9994

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/strik?utm_term=what+do+i+do+if+i+lost+my+p+ebt+card PDF link annotation
    • http://bikelumonekodex.mygamesonline.org/techniques_d_analyse_biologiques.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409395/normal_6006c4f0318f4.pdfIn PDF document text
    • http://bukapim.mywebcommunity.org/park_tool_bicycle_repair_manual.pdfIn PDF document text
    • http://rivilidopu.medianewsonline.com/vafetapesiwujirenezas.pdfIn PDF document text
    • http://peluxuba.sportsontheweb.net/doxuwexiruvavulibezimuru.pdfIn PDF document text
    • http://faxixovojaja.sportsontheweb.net/play_the_queen_s_gambit_chris_ward.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413346/normal_606c7d0778055.pdfIn PDF document text
    • http://pidagenavuziw.mywebcommunity.org/gujedalobezuxos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420592/normal_600b143914fcd.pdfIn PDF document text
    • http://xazonojader.mywebcommunity.org/grad_der_behinderung_tabelle_2020.pdfIn PDF document text
    • http://nigavereke.mygamesonline.org/kerbal_space_program_mods_nexus.pdfIn PDF document text
    • http://zabemaladameg.medianewsonline.com/xoziloxo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/97817795203.pdfIn PDF document text
    • http://tiwatimab.atwebpages.com/7218158047.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/dizefurenuv.pdfIn PDF document text
    • https://297de083-771a-4730-a3b8-a2afe8c7d209.filesusr.com/ugd/47424f_3ed11944b41646cca3f87a303f002183.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/lake_amistad_weekly_fishing_report.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/bijozonulisopiwi.pdfIn PDF document text
    • https://655b5f2c-2f45-4411-b579-7e5bd587bf3d.filesusr.com/ugd/2a272b_fcd7476e7e6344b398bc5b5e1470e208.pdf?index=trueIn PDF document text
    • https://a1bd7baf-2de3-4c81-8914-4b74a732ecf9.filesusr.com/ugd/c89f15_2f09c379bd754a85b6ebda395b92da79.pdf?index=trueIn PDF document text
    • http://rolubumemetujin.atwebpages.com/gapenatamez.pdfIn PDF document text
    • https://651f5d5e-5f42-4fb0-8380-889764ca350f.filesusr.com/ugd/b2f7c1_b5782c3d8b224dc0807ece058b78c420.pdf?index=trueIn PDF document text
    • https://8546b567-499d-44cb-812b-f4cb210fa0cc.filesusr.com/ugd/1f0b74_29bac32fb3874644bf9960763a53c334.pdf?index=trueIn 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_off0000f895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF895 5652 bytes
SHA-256: 8ab828d3f2bc28eb56b7b8adfa82d5f18b551d89431179108f1b9914f4aee8e7
font_01_sfnt_off00010bb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB3 11112 bytes
SHA-256: d2508f6da826ee4fa23f5c6f14cb07310792798e08084ff442ea4e6cba024a36

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