Malicious PDF — malware analysis report

Static analysis result for SHA-256 b34a9d82ba4fdd56…

MALICIOUS

PDF

79.3 KB Created: 2021-03-05 10:57:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5c37db82e3b4ce094c39ce3b8fcce7f3 SHA-1: 6c1f7d1a4db9f4b29b9cbe4cb1815e3ede6e7eb6 SHA-256: b34a9d82ba4fdd5627b5f95914acb327503f983f4e68ee9b39f2eb629e59c69a
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/strik?utm_term=duraflame+infrared+quartz+heater+repair PDF link annotation
    • https://cdn.sqhk.co/kogewole/iQjcmif/12980828549.pdfIn PDF document text
    • http://fibipowokogo.sportsontheweb.net/86923730816.pdfIn PDF document text
    • http://dalifajebuxog.scienceontheweb.net/how_do_you_fix_a_kenmore_ice_maker.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwopaperuv/jVBgdjd/win_10_create_device_manager_shortcut.pdfIn PDF document text
    • https://cdn.sqhk.co/kulukopupiw/giDSigH/new_homes_for_sale_splendora_tx.pdfIn PDF document text
    • https://cdn.sqhk.co/gizulakofo/iQaieV0/36771993563.pdfIn PDF document text
    • http://raxejudesezix.scienceontheweb.net/maxeredit.pdfIn PDF document text
    • https://mixorone.weebly.com/uploads/1/3/1/4/131438240/sedifero.pdfIn PDF document text
    • http://kugewezebuvigiw.mygamesonline.org/xevejopetetifizojabemidem.pdfIn PDF document text
    • https://tomosuboma.weebly.com/uploads/1/3/5/3/135382902/2016098.pdfIn PDF document text
    • http://jinunagavep.iblogger.org/5416186520.pdfIn PDF document text
    • http://kedugobepuged.mywebcommunity.org/when_was_the_lenovo_t420_released.pdfIn PDF document text
    • http://boraguw.medianewsonline.com/ebt_card_customer_service_number_pa.pdfIn PDF document text
    • https://cdn.sqhk.co/puvubuzu/dOAicig/pobuwufagudegilopi.pdfIn PDF document text
    • http://kinemulawaw.sportsontheweb.net/86990324722.pdfIn PDF document text
    • http://gubixazolela.sportsontheweb.net/sedekemo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xajejewaf.rf.gd/punof.pdfIn PDF document text
    • http://pujumek.myartsonline.com/us_navy_civilian_pay_grades.pdfIn PDF document text
    • http://jasigobup.epizy.com/adirondack_chair_plans_templates_free.pdfIn PDF document text
    • http://gufolisalowu.rf.gd/toyota_camry_se_2018_specifications.pdfIn PDF document text
    • http://jesegusanasukan.epizy.com/how_to_reset_code_on_schlage_fe595.pdfIn PDF document text
    • http://vimixof.onlinewebshop.net/59844696866.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_off0000fa1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1B 5280 bytes
SHA-256: 3fe459b32e18613f1a09e69d10bad7f33f121d3f99448b1ac88fdafae2d077b2
font_01_sfnt_off00010bee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BEE 10608 bytes
SHA-256: 0678c6c58fd131998b901b10bbd3422bb77436641a44e68bbe24375963ddb943

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