Malicious PDF — malware analysis report

Static analysis result for SHA-256 deba254b8b3afb40…

MALICIOUS

PDF

78.8 KB Created: 2021-04-05 01:22:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: e49ef2bc134df00c4b50ab248f6172d2 SHA-1: 223f2f4fb0648d97030e380d121031756ba91e69 SHA-256: deba254b8b3afb409a585f589dd5defdc1db81fbc706cf6aa273392312af53c5
134 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with the primary malicious link pointing to 'fokemale.ru'. The document body, though heavily obfuscated, suggests a lure related to a 'spotted lanternfly quarantine', likely a pretext to encourage clicking the malicious link. No scripts were extracted, but the PDF structure and URL analysis strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://fokemale.ru/strik?utm_term=what+is+the+spotted+lanternfly+quarantine PDF link annotation
    • https://cdn.sqhk.co/nipigagavadu/ijjFTib/pimoxa.pdfIn PDF document text
    • https://cdn.sqhk.co/zolilobup/O10gind/pupps_rash_natural_treatment.pdfIn PDF document text
    • http://sewawena.scienceontheweb.net/80953752858.pdfIn PDF document text
    • http://dokaxirugik.medianewsonline.com/bayesian_theory_and_applications.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/eQE7hdr/road_riot_tango_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tanemurad/Ejjhhja/the_way_we_were_song_free.pdfIn PDF document text
    • https://cdn.sqhk.co/zopimoforaja/ebPhb3A/1931829460.pdfIn PDF document text
    • http://biparajakoji.22web.org/aruvam_tamil_movie_free_tamilrockers.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/JBMibjb/losasajesetufij.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/jijumupade/tukipopexebinep.pdfIn PDF document text
    • http://redejepivu.rf.gd/free_sheet_music_for_brass_band.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/bayes_theorem_conditional_probability_examples.pdfIn PDF document text
    • http://wapofele.epizy.com/canon_ip2700_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e28ae53-962e-41f5-a746-46f1c7527673/puxelupemikimakoxikixef.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/50380835894.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d0df4ec-0470-4323-81ad-9f265c39926e/17312424445.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/apics_dictionary_free.pdfIn PDF document text
    • http://xezaretidatoro.onlinewebshop.net/adobe_reader_apk_for_windows_8.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_off0000f548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF548 5372 bytes
SHA-256: 01a68a28650f33ce68583776d68fb5b2fd0a92e6c2233307421d1680c24c9a6a
font_01_sfnt_off00010797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10797 11384 bytes
SHA-256: 3e8111a4fc192b04a611b3cf5c087c6144ca661d10f1330f1cbc459792fb8601

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