Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fb23bac14036c74…

MALICIOUS

PDF

78.5 KB Created: 2021-03-20 20:37:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 379e8f205a6eb8f0d8c17c508a1797e5 SHA-1: 879268199e7f2a3eb9af8ebe7c65e12c101d0e06 SHA-256: 1fb23bac14036c7448ea702aac085634b3972a26f781427a6b22266e16ce4b36
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://botokaw.ru/aws?utm_term=how+to+learn+the+nec+code+book PDF link annotation
    • https://rekenapun.weebly.com/uploads/1/3/4/8/134851377/ead45308ee3d29.pdfIn PDF document text
    • http://trokot-tonirovka.online/3378934541os3ik.pdfIn PDF document text
    • https://batezumepew.weebly.com/uploads/1/3/4/4/134479003/4752093.pdfIn PDF document text
    • http://giveaway2020.info/40534922520idmg.pdfIn PDF document text
    • https://gosibipidumoduj.weebly.com/uploads/1/3/4/3/134318513/pimonoliforejux-xegivir-sunoxijun-nakogogigeri.pdfIn PDF document text
    • http://funseeds.site/terranova_s_pizza_bunnell_floridajt5lx.pdfIn PDF document text
    • https://zedowami.weebly.com/uploads/1/3/1/6/131637063/xirixegow.pdfIn PDF document text
    • http://lenemoloj.22web.org/bing_maps_desktop.pdfIn PDF document text
    • https://jedidaril.weebly.com/uploads/1/3/4/6/134687024/8236552.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zavinawotomuvef.epizy.com/arduino_course_syllabus.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/90899363317.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/15674580390.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93e70c7a-aa48-4d2b-95ad-80e73d6c7651/dish_tv_channel_list_file.pdfIn PDF document text
    • http://favukimasinete.rf.gd/lettre_alphabet_arabe.pdfIn PDF document text
    • http://dimesagir.epizy.com/96665167328.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/pokemon_story_books_early_reader.pdfIn PDF document text
    • http://gitogopafo.epizy.com/27634956774.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/top_3rd_person_shooter_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e739133-0ac1-41de-b8d4-a006bce6414d/jizetojasaga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f96d2635-4fbe-471c-a8c9-35cb56b918a0/dream_interpretation_snake_bites_cat.pdfIn PDF document text
    • http://gawadatij.rf.gd/giwibikaz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e68f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE68F 4848 bytes
SHA-256: 12217a8ce504a734f97702e525f657acbb2f41891e0c2ec21485a21991c6ee07
font_01_sfnt_off0000f702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF702 11204 bytes
SHA-256: 8c5a2547dbd8856ef91081e7f425e85fd2a3a0e16a457cd71b8151efcad8c9d1
font_02_sfnt_off00011d32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D32 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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