Malicious PDF — malware analysis report

Static analysis result for SHA-256 94abb6dff76b0ea8…

MALICIOUS

PDF

85.9 KB Created: 2021-03-14 15:04:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: fcab055423c2be52525530453de799e6 SHA-1: b21277a9aa00cb92ae8b46d609e1be94adb83492 SHA-256: 94abb6dff76b0ea812d179e63fa10df4e1a69ac4f3511626fcab00d864efd24d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xajibur.ru/wix?keyword=pre+calculus+parametric+worksheet+2+answers PDF link annotation
    • https://cdn.sqhk.co/lukuvekeliki/fjf8geB/buzzer_push_button_arduino.pdfIn PDF document text
    • https://fojevatiseme.weebly.com/uploads/1/3/4/4/134400043/detisibofafezaz-gevirawowomafil-tizok.pdfIn PDF document text
    • http://nowanedilado.22web.org/formal_letter_addressed_to_principal.pdfIn PDF document text
    • https://cdn.sqhk.co/dewufidabo/nOaCaii/disney_frozen_2_imagine_ink_coloring_book.pdfIn PDF document text
    • https://zonilalafujagep.weebly.com/uploads/1/3/4/7/134731182/9db208798e1.pdfIn PDF document text
    • https://sikowegapewabi.weebly.com/uploads/1/3/5/9/135975971/dovalewaven.pdfIn PDF document text
    • http://fragcups.com/naxugivpz4g.pdfIn PDF document text
    • http://creditscoretracking.info/851004533447qamj.pdfIn PDF document text
    • http://zavifuvalo.22web.org/catheter_ablation_for_atrial_fibrillation_guidelines.pdfIn PDF document text
    • https://fepafevadaxajaw.weebly.com/uploads/1/3/4/0/134095897/9885565.pdfIn PDF document text
    • http://totakonepis.iblogger.org/early_stage_rheumatoid_arthritis_in_hands_treatment.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449992/normal_5ff466fe024a6.pdfIn PDF document text
    • https://cdn.sqhk.co/tugirujozi/edhiggQ/disorder_synonyms_and_antonyms.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412894/normal_60489e96d8e37.pdfIn PDF document text
    • https://wimugedi.weebly.com/uploads/1/3/4/7/134725841/67447837741c86.pdfIn PDF document text
    • http://erogan24.website/xagozulaxepenanunavw6xu4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475389/normal_5feb408b348d3.pdfIn PDF document text
    • http://pixelbarista.com/john_deere_mower_deck_setupu6qqc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xefobimulekojuw.epizy.com/mumaboki.pdfIn PDF document text
    • http://zoletiwosi.rf.gd/bhutanese_latest_songs.pdfIn PDF document text
    • http://dabogubomukifu.rf.gd/fuzusojitenobepof.pdfIn PDF document text
    • http://ketaxesam.epizy.com/77887611345.pdfIn PDF document text
    • http://mojilobopage.rf.gd/1251053040.pdfIn PDF document text
    • http://kivekogifix.epizy.com/voguja.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_off000110a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A3 5460 bytes
SHA-256: d5678078573a402eca0e8a223908fb4f7aaf1e522d7391042f4571053c2449ce
font_01_sfnt_off0001231f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1231F 11364 bytes
SHA-256: cb65e1476d19a34d48ba7cebe58afc618c4b09b5f5afacb6f08924bb28fac1f5

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