Malicious PDF — malware analysis report

Static analysis result for SHA-256 daf4506db3128d28…

MALICIOUS

PDF

79.7 KB Created: 2021-03-18 02:42:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4f8a6741f90893ba1fa7307e9b132b39 SHA-1: 9f29de3c93b01b73976f87e0b08262ee7d2592d2 SHA-256: daf4506db3128d28ce6e4d79d30a79e639228b21e41660e1467255820cd1ea19
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 0.9992

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://dafemum.ru/123?utm_term=medians+and+centroids+cw+worksheet+answers PDF link annotation
    • http://wusodopepufex.66ghz.com/happy_birthday_quotes_images.pdfIn PDF document text
    • http://walabowagem.iblogger.org/fasedisikexomasiwij.pdfIn PDF document text
    • http://sawemawe.mywebcommunity.org/8467954663.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381102/normal_5fe0999029132.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479254/normal_5ff55bb98835d.pdfIn PDF document text
    • http://piludid.22web.org/ashfall_mike_mullin.pdfIn PDF document text
    • http://vogolimipogusoz.mypressonline.com/25115853048.pdfIn PDF document text
    • http://sepibuzare.22web.org/27988681617.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368991/normal_60269e0d1a100.pdfIn PDF document text
    • http://nenugatigubom.66ghz.com/suffix_worksheets_for_grade_6.pdfIn PDF document text
    • http://sewawena.scienceontheweb.net/75816435292.pdfIn PDF document text
    • http://vipimuxatomefi.medianewsonline.com/drinkwell_platinum_pet_fountain_stopped_working.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376369/normal_6046eadcd7b51.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fasudum.rf.gd/delta_childrens_portable_mini_crib_mattress.pdfIn PDF document text
    • http://gijafusatuvaxoj.rf.gd/how_to_make_a_homemade_bat_houses.pdfIn PDF document text
    • http://sefukapa.epizy.com/stent_in_heart_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51f78dd9-46c2-4dc4-98c7-05e7a8aba234/mercury_4000_gen_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/109ef0f2-c484-4342-a7de-c2f156b398c7/how_to_write_a_script_for_a_video_essay.pdfIn PDF document text
    • http://bubokamuwejutul.rf.gd/76819361860.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc149c29-997f-48fc-9ca5-03b0b7e1f82a/29654336144.pdfIn PDF document text
    • http://fizuxobitunoge.epizy.com/boksmart_team_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce564189-3da1-4f49-bbef-8bed31c7d6e8/2031322488.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebba7ab1-4c7c-4dcc-85b1-4b1be8cb2122/jufajibike.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA39 5156 bytes
SHA-256: f4358f1f4f5b0eafdd5459ec9ff7490829eb80f928bf6c3bf532ee3e21a68b1a
font_01_sfnt_off00010bdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDC 11008 bytes
SHA-256: b2880c8dcbcf7cb96b979008356473eb121973c08df1e14e451dc2ae24432074

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