Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fae23ab33a90262…

MALICIOUS

PDF

78.1 KB Created: 2021-03-23 02:44:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f2d1d31b8dac693b637ca59c9ac10435 SHA-1: b2e87f2e7cc6cd87441d60c8d711aafdc95fdd16 SHA-256: 8fae23ab33a90262f2b8f172c7154729ef3bf8e5a6e44bca8e0df317c6fcb0ba
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded links, with one prominent URL pointing to a suspicious domain. Heuristics indicate it functions as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing given the urgency lure.

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
  • 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://mezovuduw.ru/123?utm_term=aladdin+song+ming PDF link annotation
    • http://kimujedat.mygamesonline.org/66495865139.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382953/normal_601b0cae2b848.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418191/normal_601e90eff2f4d.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/zalomi/70074688986.pdfIn PDF document text
    • http://nopizimexid.rf.gd/takazu.pdfIn PDF document text
    • https://065b66ee-25d8-4381-b309-094abc4d823c.filesusr.com/ugd/2703e6_7d1f858769e744268336206a85d37919.pdf?index=trueIn PDF document text
    • http://jidumefimu.rf.gd/georgia_9th_grade_biology_textbook_online.pdfIn PDF document text
    • https://63995da9-74be-4895-8497-a4fa53c9845d.filesusr.com/ugd/788c84_f030f7013d3841e2b6aaabd5a0e4153e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/230a10d6-f518-44b2-b387-5694af48bce1/45294831031.pdfIn PDF document text
    • http://ledufowi.myartsonline.com/beginner_bookkeeping.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89b9523e-c097-4eee-a3b0-81eadaec79de/samsad_bengali_to_english_dictionary_free_download_for_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba19f737-29d2-4fa8-9027-2fa3b6017a3c/90758431973.pdfIn PDF document text
    • https://43fe4710-460a-4ad3-90dc-2dd795c51528.filesusr.com/ugd/a32c20_d7fc166966bc4691b2c17b3f203f156c.pdf?index=trueIn PDF document text
    • https://9cf5cc10-3c2e-4e30-ae6b-73ed7beed88a.filesusr.com/ugd/5c2b46_7c5784797480443890ab760679dc15ae.pdf?index=trueIn PDF document text
    • http://japotegalavig.epizy.com/35005237375.pdfIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/14764489621.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_off0000f2e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E6 5040 bytes
SHA-256: 216aeebe41745866cfa9459445385aa26a6c9dd87692bdaf8d7a33b942ac7d2a
font_01_sfnt_off000103f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F8 11328 bytes
SHA-256: e2b7df0c95573ca3de63aa38025480ff4724cd5ea8f23140566ca763a47a98ed

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