Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d34dc086005af1d…

MALICIOUS

PDF

73.5 KB Created: 2021-03-29 07:28:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 24b6ea313020a064d96a7eb44c78a0c4 SHA-1: 684cbca04d1be7f7810c2a04fce7ccc972bc34c8 SHA-256: 8d34dc086005af1df0a1ecc4ef1443c9ec62404abfda5e7d68651f07ad6cd0a9
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to deliver a secondary payload or redirect to a phishing site. The document body, though partially garbled, suggests a lure related to 'personality types and rarity'.

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://resalured.ru/strik?utm_term=personality+types+and+rarity PDF link annotation
    • https://gatodagimisosog.weebly.com/uploads/1/3/1/3/131379801/6462562.pdfIn PDF document text
    • http://koprovk.xyz/kumurewavuzutijegikivifabr40e0.pdfIn PDF document text
    • http://grandov.pro/ziputifixod94op9.pdfIn PDF document text
    • http://lnstagramverifiedsbadgesforms.com/present_continuous_tense_exercises_with_answerswpvwz.pdfIn PDF document text
    • http://leopolds.space/kepoxewyb6t.pdfIn PDF document text
    • https://cdn.sqhk.co/xebosulog/zjgxjgV/podcast_addict_app_continuous_play.pdfIn PDF document text
    • https://xofanasafavusov.weebly.com/uploads/1/3/4/3/134399160/173fc349e.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/CeW8Yie/rimidozilitimonofitiga.pdfIn PDF document text
    • https://cdn.sqhk.co/muligumixe/ashijjj/day_of_the_dead_girl_wallpapers.pdfIn PDF document text
    • https://cdn.sqhk.co/bipadifudame/gdbvQhc/72355629212.pdfIn PDF document text
    • https://cdn.sqhk.co/naziwixolagu/jezgdLO/tivigozajonil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://megavidovafivo.epizy.com/262233912.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/what_is_the_characteristics_and_function_of_gothic_architectural_style.pdfIn PDF document text
    • http://mibelajute.epizy.com/australia_time_date_format.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/kosizoxijurever.pdfIn PDF document text
    • http://rupiroliwon.epizy.com/american_truck_simulator_mods_free.pdfIn PDF document text
    • http://tegumebedizeso.epizy.com/bobabibuzop.pdfIn PDF document text
    • http://zikepodaw.epizy.com/87800775067.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/how_to_do_wim_hof_breathing_exercises.pdfIn PDF document text
    • http://gebavuzulom.epizy.com/administrao_de_pequenas_empresas_nfase_na_gerncia_empresarial.pdfIn PDF document text
    • http://vedewujesog.rf.gd/comment_fusionner_2_mac.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_off0000e066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE066 5056 bytes
SHA-256: f142511093f277d734d0feb0da4c4a8058df7c7f0fa17400df3ad975741064e2
font_01_sfnt_off0000f1a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A8 12172 bytes
SHA-256: 5d164574a4fced8a9ba09435a54407471a30a110db376048420b0402ee49f878

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