Malicious PDF — malware analysis report

Static analysis result for SHA-256 7911a8d5669fcde7…

MALICIOUS

PDF

76.6 KB Created: 2021-03-22 11:07:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: d8d1c7453c87fe7fe56b61325ef9c89b SHA-1: 8e001f756ef2a9fbf8462e2fde435d18a6c09af4 SHA-256: 7911a8d5669fcde7b33d2efd06c35bc411e8d9244d4d2f42a54384359d534498
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML and ClamAV, as malicious and likely phishing-related. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains a phrase that appears to be a lure, and the presence of external URIs indicates an attempt to direct the user away from the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/aws?utm_term=my+sole+treadmill+won%2527t+turn+on PDF link annotation
    • http://sodalabs.pro/how_to_properly_dispose_of_smoke_detectors608c4.pdfIn PDF document text
    • http://duwinijuj.mypressonline.com/sirokubopor.pdfIn PDF document text
    • http://jeruxawi.iblogger.org/23156751081.pdfIn PDF document text
    • http://gimatadokij.mygamesonline.org/12680484683.pdfIn PDF document text
    • http://wogavuxemadirof.iblogger.org/digekikinebawomil.pdfIn PDF document text
    • http://sukutoxuwurif.mywebcommunity.org/81904933680.pdfIn PDF document text
    • http://tuwasukam.getenjoyment.net/cambios_psicologicos_durante_el_embarazo.pdfIn PDF document text
    • https://cdn.sqhk.co/jusulikipe/V7ichhk/43333450348.pdfIn PDF document text
    • https://cdn.sqhk.co/wosepimi/hfMrhtm/jbl_music_10_subwoofer_specs.pdfIn PDF document text
    • http://xijafagupigor.22web.org/top_android_auto_head_unit_2019.pdfIn PDF document text
    • http://kudukudimox.sportsontheweb.net/conair_extreme_steam_instructions.pdfIn PDF document text
    • http://brandframeb.com/bahubali_movie_hd_songs28dn3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ziwemasux.myartsonline.com/tudunuvuwatoretalirujibud.pdfIn PDF document text
    • http://gegenig.epizy.com/metformin_weight_loss_antipsychotic_induced_weight_gain.pdfIn PDF document text
    • http://nodefojabotozij.rf.gd/kunagibumaku.pdfIn PDF document text
    • http://dokonofuliwuki.rf.gd/how_to_obtain_pmp_certification_online.pdfIn PDF document text
    • http://wojobawezelo.rf.gd/life_cycle_of_a_chicken_ks1_worksheet.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_off0000ed77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED77 5204 bytes
SHA-256: a000249fb5784381b6d84640553db178f3425fc3bf1d58396b0f973bfbb193db
font_01_sfnt_off0000ff3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3C 10712 bytes
SHA-256: 644acb81c84c5b2b95fc6ab5f1fd200d742f7c45cd27e87f1a56c12caf862f1c

Open this report in the interactive analyzer, or submit your own file for analysis.