Malicious PDF — malware analysis report

Static analysis result for SHA-256 35cc43d3bc3443c6…

MALICIOUS

PDF

68.6 KB Created: 2021-02-16 01:52:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b4c189bf5cb02ab980227725838f5971 SHA-1: 9ea1949373f8102132751f59d683e7a1eaf5b671 SHA-256: 35cc43d3bc3443c62617f969fabbac0ae4e415ff22382230e8d46af07be18c0f
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 0.9997

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://seumenha.ru/wix?keyword=capitalizing+proper+nouns+worksheet+2nd+grade PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4465690/normal_5fca340a22e56.pdfIn PDF document text
    • http://myshoes.moscow/998478577898p5w7.pdfIn PDF document text
    • http://udilische.club/android_aes_encryption_ivzb0em.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449777/normal_5feebe017c64c.pdfIn PDF document text
    • http://mini-cam-v2.club/year_3_numeracy_worksheets_free74dda.pdfIn PDF document text
    • http://starconflict-game.ru/billboard_wireless_headphones_bb1827_manualizx0u.pdfIn PDF document text
    • http://amin-ukraine.net/mineral_wells_isd6lyc9.pdfIn PDF document text
    • http://espaceabone.com/loudspeaker_designkq7t0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469827/normal_5ffa3d4cd1564.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466675/normal_5fc8fecf0e279.pdfIn PDF document text
    • http://remont-kholodilnikov.website/bewars_movie_song_in_telugui1jsk.pdfIn PDF document text
    • http://shopee24.site/saguniwoqh.pdfIn PDF document text
    • http://idealicaitalia-official.site/infiniti_red_bull_racing_car_2019rhtmu.pdfIn PDF document text
    • http://nasty666.space/wartune_sylph_guide_for_knightztosc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366009/normal_601a850f8ec69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451210/normal_5fe792028bdbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491688/normal_60216e8bbc04b.pdfIn PDF document text
    • http://swiss-family.space/sony_xplod_radio_user_manual67h1q.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://gonulurejojele.epizy.com/action_plan_format_for_business.pdfIn PDF document text
    • http://tavarifa.epizy.com/89140095928.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC305 5464 bytes
SHA-256: acb00f67a5e5fca3d9e3dfbb1e299f74317e7cf1f8522b1f9493e5ef791099a1
font_01_sfnt_off0000d5ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5AD 9628 bytes
SHA-256: 04e53177ba2a082fdbcf669a85d9c4e7f62d1748b86930f003e5f327416ea129
font_02_sfnt_off0000f690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF690 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

Open this report in the interactive analyzer, or submit your own file for analysis.