Malicious PDF — malware analysis report

Static analysis result for SHA-256 27d2ac9ba123dc25…

MALICIOUS

PDF

82.9 KB Created: 2021-03-03 06:21:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f9c16aeef274f4ad3e23a422f62f1ba9 SHA-1: 7969e515c7c8633e693c94f3a49c9a6e9609ce94 SHA-256: 27d2ac9ba123dc259035494471f99577abf6555e494955b957d7870a2f3d9c75
186 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, with numerous external URLs embedded within its structure. The primary heuristic firings indicate a mass of external PDF links, many on disposable hosting, suggesting an attempt to drive traffic to potentially malicious or phishing sites. The ClamAV detection and ML classifier further support its malicious nature, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/aws?utm_term=shakespeare+sonnet+73+interpretation+deutsch PDF link annotation
    • https://cdn.sqhk.co/wodaximewule/Thihijt/17114347384.pdfIn PDF document text
    • https://nosisakapu.weebly.com/uploads/1/3/4/7/134773138/8098676.pdfIn PDF document text
    • https://pepesavujol.weebly.com/uploads/1/3/1/0/131071240/296be5b8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466161/normal_602a39042efcd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449616/normal_6028253172111.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369306/normal_6026a8481a89a.pdfIn PDF document text
    • https://zapirugitoz.weebly.com/uploads/1/3/4/5/134508168/ruwarisoki-tolikuzomefim-nekomawudev-tobagoviz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479433/normal_6019aadc9264d.pdfIn PDF document text
    • https://cdn.sqhk.co/reparepoki/gDidjjf/simple_cake_decorating_recipes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489977/normal_5ff30b2b775bd.pdfIn PDF document text
    • https://gupapuna.weebly.com/uploads/1/3/4/7/134726568/pubupenaravasulesiw.pdfIn PDF document text
    • https://gidelusibi.weebly.com/uploads/1/3/4/0/134040719/3294662.pdfIn PDF document text
    • https://zowisedaro.weebly.com/uploads/1/3/4/3/134355737/6573651.pdfIn PDF document text
    • https://cdn.sqhk.co/suwapipejob/ideguEm/good_night_stickers_2020_wastickerapps._com.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401985/normal_5fc87c4b2012a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453334/normal_5fe66576f1048.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425784/normal_5fcb9762e9812.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453560/normal_603db97229fe1.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxomawelej/IWgg3Yo/best_cooking_games_switch.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/sebunuzu/wubilekipewodipebis.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/employment_contract_template_au.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_off00010380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10380 5540 bytes
SHA-256: 33b76ccec9668742eddfa5bcbfa874dbd7eb03c85439e697110981757784b54a
font_01_sfnt_off00011654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11654 12000 bytes
SHA-256: 2f83a79a5e85c5f9d0abea9a078c63fb30ffd788782f46db49a72aa74ee8ba64

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