Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3e679e006aac879…

MALICIOUS

PDF

77.7 KB Created: 2021-03-21 06:44:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: dd4758a78d298937304491384f2b218d SHA-1: 79edbbec8c2c79d463a4d106a9a2001d0250e60a SHA-256: e3e679e006aac879a8a7f2db2be41247a8b7308008c07c00addcdc83633b128e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing or distributing further malware. ClamAV detection and ML classification strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

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://gimoguvi.ru/wix?keyword=star+trek+online+ps4+manual+aim PDF link annotation
    • http://remont-kvartir-otzyvy.moscow/ruwafokirzddp6.pdfIn PDF document text
    • http://fanuvazav.scienceontheweb.net/39867197889.pdfIn PDF document text
    • https://pupifino.weebly.com/uploads/1/3/0/7/130776741/2d9c187d288.pdfIn PDF document text
    • https://bizutimuja.weebly.com/uploads/1/3/3/9/133999747/lejazixigime-pexisawuko.pdfIn PDF document text
    • http://meetplafond.xyz/what_is_working_class_culture_uka1u7r.pdfIn PDF document text
    • http://nipawifaxupus.mygamesonline.org/capacitor_start_capacitor_run_motor_wiring_diagram.pdfIn PDF document text
    • http://jofipifemu.medianewsonline.com/53668680259.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370280/normal_6023518e05832.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383681/normal_5ffd5b75a3c2b.pdfIn PDF document text
    • https://movadopudi.weebly.com/uploads/1/3/0/9/130969115/8ece67a6a135f7b.pdfIn PDF document text
    • http://vepenuvix.mygamesonline.org/metric_bolt_and_spanner_size_chart.pdfIn PDF document text
    • http://marketop.club/kandidiasis_adalahqqn7o.pdfIn PDF document text
    • http://artrosil.xyz/repaso_del_capitulo_crucigrama_answers_1a-_8sgwcv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453327/normal_5fccc4102719e.pdfIn PDF document text
    • http://lavkavkusa.store/36333222556xxb3.pdfIn PDF document text
    • http://ropisunofo.mygamesonline.org/91541050065.pdfIn PDF document text
    • http://noxepometiv.iblogger.org/33620573445.pdfIn PDF document text
    • http://skidki-day.store/arduino_mega_digital_pins_not_workingmpe4v.pdfIn PDF document text
    • http://pelistens.xyz/63463107410zp3ko.pdfIn PDF document text
    • https://vasalidut.weebly.com/uploads/1/3/0/9/130969475/a073a936c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://puwovejivu.rf.gd/spiderman_games_for_free.pdfIn PDF document text
    • http://bavidoripo.epizy.com/39364358104.pdfIn PDF document text
    • http://jutufevokozal.epizy.com/xotikanuvur.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_off0000f16b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16B 5220 bytes
SHA-256: e60c0dc18dc9b24749238cc36ad67a7d63e56389cefe59874f2719182316bdbd
font_01_sfnt_off0001031e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1031E 11200 bytes
SHA-256: 26b198b8f205dfc5cc7de0e4e72c0e94abd657bfdffdf45a22a2eecc2669b876

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