Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a3d7e000852e1e1…

MALICIOUS

PDF

86.1 KB Created: 2021-03-23 06:49:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a03ab779b5de0810093511c69cc74f70 SHA-1: db6bfa9ad9862b7a33e5c6608e6a1872c6a3291a SHA-256: 1a3d7e000852e1e176f75017acc1d181d17bbafbef3da1dc7f742c3a0ee331bd
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution attempt. It contains a large number of external links, many of which are likely part of a link farm designed to direct users to malicious sites. The document body, though heavily obfuscated, appears to contain metadata related to product pricing, suggesting a lure to entice users to click on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/strik?utm_term=blackberry+classic+q20+price+in+pakistan
    • https://xiligori.weebly.com/uploads/1/3/1/4/131411896/rusojumon.pdf
    • http://gekifek.scienceontheweb.net/diketi.pdf
    • https://wosiwimobej.weebly.com/uploads/1/3/1/1/131164223/40065efa130.pdf
    • http://gililofus.medianewsonline.com/assamese_news_paper_download.pdf
    • https://judozonax.weebly.com/uploads/1/3/1/4/131454501/senumaxewimiwop_lakaxabulojup_sigukijibufo.pdf
    • http://sopugepibimel.mypressonline.com/23623093606.pdf
    • http://vopezikililurab.mygamesonline.org/megaxorusodaso.pdf
    • https://benukozememig.weebly.com/uploads/1/3/4/4/134480731/riziri-toxunusumas.pdf
    • http://spoonnumberone.xyz/63962626956d4sxl.pdf
    • https://mivatuvogap.weebly.com/uploads/1/3/4/0/134040868/rusuri.pdf
    • http://mizebojusur.mypressonline.com/bangalore_mirror_newspaper_today.pdf
    • http://balegetiwep.mywebcommunity.org/webesimeresufojanuwudix.pdf
    • http://normaa-id.com/why_should_we_hire_you_data_entrywxkjz.pdf
    • http://furogoverakafex.22web.org/rapumabafagakigevasupat.pdf
    • http://servempieza.site/kezerepedadisikubi6b20h.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://xisuwujilaxemer.myartsonline.com/well_stimulation_in._petroleum_engineering.pdf
    • https://a694a867-b0fa-45cd-b082-7f9abf80b1a7.filesusr.com/ugd/430cb2_bb434eb7ec3446ef98bf322cefb9552d.pdf?index=true
    • https://37bcb4aa-7747-4ff6-a352-0e22bf983c21.filesusr.com/ugd/4393d3_12ff35933a344cd08fb495692e9f5f51.pdf?index=true
    • http://xufolat.atwebpages.com/strategic_thinking_in_business.pdf
    • http://xelidamos.epizy.com/85118163949.pdf
    • http://vawirir.atwebpages.com/english_alphabet_sounds_in_urdu.pdf
    • http://mukanebesiva.atwebpages.com/645155920.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001034e.bin
416d3a632099f5ffa8a5c819b480158bc4971a6de483c4add9ffa53bb8978a1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1034E 5360 bytes
font_01_sfnt_off00011599.bin
5b78a0a244101d7891e8f96e27b962bf30c539c9323639fe9188ae5b0df29ade		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11599 11028 bytes
font_02_sfnt_off00013b09.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13B09 4324 bytes

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