Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e70337bab7573c2…

MALICIOUS

PDF

84.8 KB Created: 2021-03-11 14:13:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: a263deed4d090b567e29c767ebb91c91 SHA-1: ae4706692be49d5bf5f5a340941e0b4e48db0ebd SHA-256: 0e70337bab7573c299641eb9a87efcfc4b28b8a9dd2f2dfc1be85824392abf2d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and is flagged by heuristics as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure itself facilitates the redirection to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://bologen.ru/wix?keyword=how+to+install+minecraft+texture+packs+1.5+2+windows+7 PDF link annotation
    • https://pexigupor.weebly.com/uploads/1/3/4/9/134901766/e3c0bc697.pdfIn PDF document text
    • http://kikifikoxije.mypressonline.com/tusozorar.pdfIn PDF document text
    • http://noverst.xyz/navy_federal_pay_dates_2020_va_disabilitybidgl.pdfIn PDF document text
    • https://nijuvijoz.weebly.com/uploads/1/3/1/4/131408832/1366704.pdfIn PDF document text
    • http://roskycnmx.com/86895124257qo02l.pdfIn PDF document text
    • https://rutuwupu.weebly.com/uploads/1/3/1/3/131378820/kovodibavoke-noxutejoxoxisin-fokopabaza.pdfIn PDF document text
    • http://pililiriniru.mypressonline.com/wonders_of_the_world_book.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485703/normal_5ffbb29a01373.pdfIn PDF document text
    • https://cdn.sqhk.co/kopozufu/RHIifHm/amc_24_movie_theater_highlands_ranch_co.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456376/normal_5ff2508f1c3a1.pdfIn PDF document text
    • http://scarcebook.com/91879177670t8oc.pdfIn PDF document text
    • http://gratoramm.website/walmart_tires_near_me_openj6to5.pdfIn PDF document text
    • http://tefituguj.iblogger.org/noridisedunajapugeg.pdfIn PDF document text
    • https://damasixo.weebly.com/uploads/1/3/5/3/135322107/706021.pdfIn PDF document text
    • https://cdn.sqhk.co/parikozug/ehaiJhi/rts_program_2.pdfIn PDF document text
    • https://bemaxeviliw.weebly.com/uploads/1/3/4/4/134482954/balux_pokomuvo_vosowege_puxolorejito.pdfIn PDF document text
    • http://ginupedarokuxu.getenjoyment.net/oracle_12c_end_of_life_extended_support.pdfIn PDF document text
    • http://stroymarketmetal.ru/xowemodot019o.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwibinewife/hpE829c/lagu_gratis_petit_biscuit_sunset_lover.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xifimerin.onlinewebshop.net/calculus_1_tutorials.pdfIn PDF document text
    • http://buvazow.epizy.com/dumbbell_exercise_guide.pdfIn PDF document text
    • http://jovunalinuz.rf.gd/19220299953.pdfIn PDF document text
    • http://faloboxodutak.epizy.com/usa_time_zone_map_12_hour_format.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_off000102eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102EB 5904 bytes
SHA-256: ba6b671f086ac9406962f6a25c4428450afba8c573fa1c899902f04157950960
font_01_sfnt_off0001171c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1171C 14432 bytes
SHA-256: bf15a7a61ffe2c7528fe855ec036065e3e8d28fb9d6161b5119c79db7895feb3

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