Malicious PDF — malware analysis report

Static analysis result for SHA-256 b60cac23ff3e382c…

MALICIOUS

PDF

76.4 KB Created: 2021-03-31 07:39:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f465d722b3173a4b06fecf8b72af4d76 SHA-1: b84cfd98e8676b1fb9442b4dfdc3921b36a71f8d SHA-256: b60cac23ff3e382c1e7bab28638a62e0d3d0c691f1266fd1ed0ebe32fe86673b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xajibur.ru/aws?utm_term=alex+rider+cast+tv+show PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4500887/normal_602017f7afb4b.pdfIn PDF document text
    • https://cdn.sqhk.co/nixagigad/hDjf8ie/debavebinaru.pdfIn PDF document text
    • https://cdn.sqhk.co/dojidavos/XhdpYjf/35918968753.pdfIn PDF document text
    • https://xifuvago.weebly.com/uploads/1/3/0/8/130813557/gozavilogulul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410678/normal_601738498c5e2.pdfIn PDF document text
    • https://kipopedetazezu.weebly.com/uploads/1/3/0/7/130775623/4392045.pdfIn PDF document text
    • https://ruwatija.weebly.com/uploads/1/3/4/8/134846771/xijob_zobasada_ladejukifeper_dazadirazaj.pdfIn PDF document text
    • https://zazokovorif.weebly.com/uploads/1/3/4/3/134321981/gofofapikezifev.pdfIn PDF document text
    • https://cdn.sqhk.co/pumevigatare/ih67Khz/malivujekivisapasuxaxuna.pdfIn PDF document text
    • http://nokobefisedo.iblogger.org/monusiwodob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401546/normal_60536980989fc.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/gelawiweza/disodakawewudit.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/google_sheets_free_for_laptop.pdfIn PDF document text
    • http://wojotefeva.rf.gd/assurant_solutions_canada_claim_form.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/nhc_thiu_nhi_c_nh_thng_nhau_remix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e5329f6-3bbb-4487-85e9-a1b731b639c5/55619199906.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85c2af28-6a84-4218-9de6-ff67d9a6b230/blogging_for_dummies_6th_edition_free_download.pdfIn PDF document text
    • http://gununusaw.epizy.com/morgan_anaesthesia_6th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/girilifawuxi/1031186749.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1d4f58c-4d3a-4e8c-9349-6daf7ccd19f5/44618065013.pdfIn PDF document text
    • http://begupegag.epizy.com/28493735186.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/206feb35-0196-4ad7-a920-bf14a858c85c/nusomunokif.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_off0000ecd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD3 5236 bytes
SHA-256: 87ca3ecddceb0482bb3e67ce3de3a34d090dee85bc69bf698521845f9050688e
font_01_sfnt_off0000feb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB0 11756 bytes
SHA-256: 9389daf309a32ca0470b0d5c276029964f50bf98b69a5c23ed8b3ad9b74da462

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