Malicious PDF — malware analysis report

Static analysis result for SHA-256 71318df0d92c2424…

MALICIOUS

PDF

141.5 KB Created: 2021-03-19 11:56:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 52e773fea1a888787a903ae1e01054de SHA-1: ec7e8315c44d3e7f83471210039999496b077085 SHA-256: 71318df0d92c2424c0ca489ff59841ebc985a4e8c0303fea1b1c46b9156ab8ce
166 Risk Score

Malware Insights

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

The PDF contains multiple high-severity heuristics indicating suspicious and invisible links to external domains, such as 'loginwithfb.site'. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The embedded URLs and link farm characteristics point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://dugedepap.ru/strik?utm_term=those+who+wait+on+the+lord+will+not+be+ashamed PDF link annotation
    • http://zathkatow.xyz/bowowubunelukapunan91u4.pdfIn PDF document text
    • https://cdn.sqhk.co/rilixuzewiv/fghJQia/zotad.pdfIn PDF document text
    • https://cdn.sqhk.co/lexaxemiji/eijQCj5/kim_kardashian_hollywood_mod_apk_ios_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/dejijadu/jiqhfhd/how_long_will_the_president_speak_tonight.pdfIn PDF document text
    • https://cdn.sqhk.co/remozemot/jc4jb1x/campus_parent_portal_forsyth.pdfIn PDF document text
    • http://xofebuledat.scienceontheweb.net/centos_6_commands_list.pdfIn PDF document text
    • http://ketadiets.site/22760071267ktxv3.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/2fjdugc/candomble_religion.pdfIn PDF document text
    • http://mnclassis.org/waxovil78ti.pdfIn PDF document text
    • https://cdn.sqhk.co/xumesapaxoku/6ijjcuz/81170461102.pdfIn PDF document text
    • http://salonop.xyz/58537459800oe86r.pdfIn PDF document text
    • http://loginwithfb.site/dudawifazuvabazalemoigoka.pdfIn PDF document text
    • http://gekodejevotug.medianewsonline.com/jimixu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/92940679074.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/nagapa.pdfIn PDF document text
    • http://fikelamizogu.myartsonline.com/47494657961.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/bofeb.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/biwivekaxefugaduborasesaf.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/saserofunivoju.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/best_vector_graphics_software_for_android.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_off0001db91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DB91 5244 bytes
SHA-256: abb6571bdd1409f9a65dfa4783e1cf97325fec1502cf1df365c753149f553db3
font_01_sfnt_off0001ed46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ED46 19628 bytes
SHA-256: 4f7653b0a9b183ad79fefd5ba15df083318805f8a8f9723095a0aeb4ed193e47

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