Malicious PDF — malware analysis report

Static analysis result for SHA-256 921931bdd582eefb…

MALICIOUS

PDF

72.9 KB Created: 2021-02-22 19:30:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 9c39d24498c8cf3116f471099540e85b SHA-1: ff474892be3373cb1f5676612c9b285799ab4dfa SHA-256: 921931bdd582eefbae415ed011000ed4f7110b56a8e2a532d7f7343ca131b3b3
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous external URIs pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, suggests a lure related to 'bell f12 bike computer setup'. No scripts were extracted, but the presence of multiple external links strongly suggests an attempt to redirect users to malicious content.

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://baarspo.ru/wix?keyword=bell+f12+bike+computer+setup PDF link annotation
    • http://varerafuvurine.22web.org/sheet_pan_lemon_pepper_chicken_thighs.pdfIn PDF document text
    • https://kijidagidopijub.weebly.com/uploads/1/3/0/7/130776406/5f7608276.pdfIn PDF document text
    • https://makigomeludawuk.weebly.com/uploads/1/3/4/7/134748455/5365035.pdfIn PDF document text
    • https://cdn.sqhk.co/girewobo/ckhg8ib/36157893589.pdfIn PDF document text
    • http://jilunagobag.22web.org/xekarolufonemaxivodax.pdfIn PDF document text
    • https://zedetebi.weebly.com/uploads/1/3/1/0/131070456/sirokaladolede.pdfIn PDF document text
    • https://vitasexabu.weebly.com/uploads/1/3/0/8/130813400/205c07bae33b619.pdfIn PDF document text
    • https://cdn.sqhk.co/poxofufiko/CPngjjc/nes_emulator_free_download_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369507/normal_600e776c2abe0.pdfIn PDF document text
    • https://cdn.sqhk.co/dibirolinu/deJgfgc/mutelidi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415322/normal_5ff5e96d249c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448535/normal_601995c2d4b9d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://takugiwem.rf.gd/wigipowov.pdfIn PDF document text
    • http://baxadozivu.epizy.com/tivakedi.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/90863969394.pdfIn PDF document text
    • http://keputeka.epizy.com/rest_api_salesforce_developer_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fekife/kilotadalexezozemuzamojoz.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_off0000dffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFFA 5388 bytes
SHA-256: 5aaacf95d220a65d259c12d4497dc4e06b42e62f1aeda0c7d69f6a8ab6ecce92
font_01_sfnt_off0000f24a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24A 10736 bytes
SHA-256: a34a6972be6025ffb41bd1eef1f10f1f79bb9c5681cdacb5af4d8af0f6667a9b

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