Malicious PDF — malware analysis report

Static analysis result for SHA-256 89f1955ae3967f5a…

MALICIOUS

PDF

85.2 KB Created: 2021-03-30 01:19:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: cf825c8d9d888d3a7da100c702c3b047 SHA-1: cc42a046d747d150d471d26862e2ce338b123f7b SHA-256: 89f1955ae3967f5ac8364a870f1f12c95f7af5413058e8e0113c1805b8094c54
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many pointing to benign content, but one prominent link acts as an SEO redirector for a "free download" lure, disguised as a spreadsheet template. This indicates a phishing or scam attempt to drive traffic to malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/123?utm_term=extension+cost+spreadsheet+template PDF link annotation
    • http://pewadulojuba.mypressonline.com/92698254653.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497688/normal_5fec68de75fee.pdfIn PDF document text
    • https://cdn.sqhk.co/vatuliwa/jedgd8U/22376432634.pdfIn PDF document text
    • http://tetupamino.mywebcommunity.org/wafalilofakazadaf.pdfIn PDF document text
    • https://sipusojatavajuw.weebly.com/uploads/1/3/4/6/134606658/pulusuget.pdfIn PDF document text
    • https://cdn.sqhk.co/gebitasixa/icDhhKa/fovefofelulawo.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/ifhdu8s/market_garden_ww2_movie.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415944/normal_600fb1dd8d829.pdfIn PDF document text
    • https://jatilupek.weebly.com/uploads/1/3/4/4/134491857/bonefopawijaz.pdfIn PDF document text
    • https://cdn.sqhk.co/fuxuduxexi/gdCjgBS/zojizewex.pdfIn PDF document text
    • http://wutopezogegusi.getenjoyment.net/56587367804.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/sogovekevi/burning_bridges_mike_curb_congregation_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/george_foreman_grill_recipes_hamburger.pdfIn PDF document text
    • http://tifilow.onlinewebshop.net/definicion_de_balistica_forense.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/sacramento_bee_fishing_report_july_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/lasupafat.pdfIn PDF document text
    • https://s3.amazonaws.com/ponivotigegepub/sujotegaxexosifepobobe.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/llp_balance_sheet_format_in_excel_2017.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_off00010531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10531 5340 bytes
SHA-256: 133684858fc2e902abe5548f5db7f02c09369bd6a4ac88294aa6b134cf1fa02f
font_01_sfnt_off0001172b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1172B 1796 bytes
SHA-256: dfab3945eace5ba27be1ad95d63d5142397767eab6bca27773794b33bda2302c
font_02_sfnt_off00011fb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB5 11688 bytes
SHA-256: b98f4840af8030613c0e32f5a56e8b88192fb4b88be53fb0764cc3db87a198c9

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