Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f22f11f5b4747d5…

MALICIOUS

PDF

94.5 KB Created: 2021-04-13 09:15:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4c0ee534a4fa0af6d8905c18b6789005 SHA-1: 4dae1e955f0272367024a5f7ebd768a3aaffff65 SHA-256: 1f22f11f5b4747d5d52e076d37fd9f1428cdd2b444b4ba4e6aa8f53fa1443637
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

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 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.
  • 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://botokaw.ru/strik?utm_term=how+to+make+gear+teeth+in+inventor PDF link annotation
    • https://cdn.sqhk.co/vujagefamig/iaHdOie/widimoser.pdfIn PDF document text
    • http://riwozizedilar.mygamesonline.org/fluke_179_multimeter_user_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369932/normal_600e30c422249.pdfIn PDF document text
    • https://cdn.sqhk.co/dubikewe/ihgc6sD/86369853336.pdfIn PDF document text
    • https://cdn.sqhk.co/bulixanejad/8BjajcA/blade_and_soul_force_master_gameplay.pdfIn PDF document text
    • https://cdn.sqhk.co/mepawoworu/sthihht/free_screensavers_for_windows_7_laptop.pdfIn PDF document text
    • https://cdn.sqhk.co/kibukiwovi/dGjd1gd/sikiwotomepakexefijonot.pdfIn PDF document text
    • http://gexopidikimo.mygamesonline.org/jofis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410448/normal_5fca4831129e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463803/normal_603a9d4db1d29.pdfIn PDF document text
    • https://cdn.sqhk.co/vavefamixivi/ghdWjgn/used_mountain_bike_shops_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwefuxab/Sgjohb8/2813723337.pdfIn PDF document text
    • https://penonogam.weebly.com/uploads/1/3/4/0/134012545/6594910.pdfIn PDF document text
    • https://simokenuma.weebly.com/uploads/1/3/5/3/135311421/vikoduwewer-juperixizev.pdfIn PDF document text
    • http://gexerawoxabo.iblogger.org/accounting_tools_for_business_decision_making_kimmel.pdfIn PDF document text
    • https://folozulo.weebly.com/uploads/1/3/5/3/135351090/fararupik.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/gddHjcd/cbs_fantasy_baseball_tiebreakers.pdfIn PDF document text
    • https://gikijeza.weebly.com/uploads/1/3/4/4/134465371/fejerig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://biwefejiza.myartsonline.com/thousand_splendid_suns_movie_quotes.pdfIn PDF document text
    • http://buzekarutazobe.rf.gd/lerudemevije.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_off0001309b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1309B 5068 bytes
SHA-256: 19a586dbeef926b054c305b325f0d9f2f53166ed88914ec621043685c888ef87
font_01_sfnt_off000141c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141C2 12192 bytes
SHA-256: 2a27379baa1f63f0ae5f7ebf8598440dcabee8c515cbbbd035fab7050707abfc

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