Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dd48482b4631429…

MALICIOUS

PDF

81.5 KB Created: 2021-03-03 00:40:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 32419c38604e557f2628c690347cd1ef SHA-1: 9bdfec7a81f3b35efd6f10fb4713d2c45700ca69 SHA-256: 0dd48482b46314299cb7408b169ac9475796f58b8541df03c0bfe746352e2014
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous embedded URLs, many pointing to disposable domains, suggests a link farm designed to redirect users to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

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://leonvi.ru/strik?utm_term=youtube+the+ascent+of+money+part+1 PDF link annotation
    • http://lojapidabud.mypressonline.com/heat_exchanger_furnace_price.pdfIn PDF document text
    • http://davupopebuwiser.sportsontheweb.net/toro_s200_snowblower_carburetor_kit.pdfIn PDF document text
    • https://cdn.sqhk.co/denepepunuja/j9RwEgc/cat_escape_room_houston.pdfIn PDF document text
    • http://sevezor.scienceontheweb.net/que_significa_estilo_de_vida_occidental.pdfIn PDF document text
    • http://palikexifumalam.mywebcommunity.org/ada_berapa_surah_di_dalam_juz_ke_30.pdfIn PDF document text
    • http://lamaded.mywebcommunity.org/data_structures_and_algorithms_in_java_2nd_edition_solutions.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417216/normal_601caed6b39dc.pdfIn PDF document text
    • http://tesekal.mygamesonline.org/89405335268.pdfIn PDF document text
    • http://lupazul.mywebcommunity.org/best_place_to_learn_forex_trading_for_free.pdfIn PDF document text
    • http://bikelumonekodex.mygamesonline.org/whirlpool_wher25_reverse_osmosis_water_filtration_system_lowes.pdfIn PDF document text
    • http://rasazajafatirek.mypressonline.com/poteraxilejeluwa.pdfIn PDF document text
    • http://fajiriduxir.medianewsonline.com/dunkin_donuts_breakfast_sandwiches_calories.pdfIn PDF document text
    • http://laribij.scienceontheweb.net/55796561106.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/bidivo/entresto_patient_assistance.pdfIn PDF document text
    • http://pulutugorivexek.atwebpages.com/44549896659.pdfIn PDF document text
    • http://bitenozof.atwebpages.com/36646384384.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EA 5312 bytes
SHA-256: 366ae2dd412f6a41d39a3c7b03fd41180ac897fd030bad3a6d98869c8e1856e5
font_01_sfnt_off000107cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CF 10236 bytes
SHA-256: 0291c324932d8e2ca07bd3942271fce84d09c7be4b17c6b88203969780051edc
font_02_sfnt_off00012ac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AC3 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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