Malicious PDF — malware analysis report

Static analysis result for SHA-256 36a5741431f385ad…

MALICIOUS

PDF

76.0 KB Created: 2021-03-25 01:15:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 3f5cf90b7882fd8995818ce53c09491b SHA-1: 4eda6652bf7aae0b8ac41538587eb5a5fb497a96 SHA-256: 36a5741431f385ad148c045476c17c67323006b8dd2a6ec8830240239a618259
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous external links, including a redirector URL, suggesting an attempt to lead users to malicious content or downloads. The presence of PDF_SEO_LINK_FARM and PDF_SEO_UTM_REDIRECTOR_LINK heuristics further supports a phishing or scam-related attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://pelibifir.ru/strik?utm_term=pencil+drawing+pictures+of+gandhiji PDF link annotation
    • https://cdn.sqhk.co/nefowumik/iDDDgXc/autotune_evo_vst_plugin.pdfIn PDF document text
    • https://cdn.sqhk.co/baxorurifina/dtjcgcj/i_live_gold_edition_hack.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381551/normal_604a572b4eff8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415524/normal_6030eace0000a.pdfIn PDF document text
    • https://cdn.sqhk.co/nabaxifow/zheAaqN/zamiliduzizife.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468836/normal_5fcd37d76555e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414172/normal_605207a412395.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426942/normal_5ff1751c73c6a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490515/normal_5ffe60f443688.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410441/normal_601956ce94eb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471514/normal_5fe76972e879a.pdfIn PDF document text
    • https://cdn.sqhk.co/lenubire/XvtjhN8/emergency_call_abc_real.pdfIn PDF document text
    • https://cdn.sqhk.co/jurugaguvedu/XhgjbcZ/76760728350.pdfIn PDF document text
    • https://cdn.sqhk.co/refowofiros/tics9gf/sawojadutipudegitojojojix.pdfIn PDF document text
    • https://cdn.sqhk.co/motuwezelu/jaghhag/vatur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402963/normal_6016e2bbdfaa5.pdfIn PDF document text
    • https://cdn.sqhk.co/madagijoj/x9icUV1/top_40_songs_2019_clean_playlist.pdfIn PDF document text
    • https://cdn.sqhk.co/pikevasoze/aOKijhe/hexion_louisville_ky.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497368/normal_600cc7d763b92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390995/normal_604829541d859.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401559/normal_604a9661d9f54.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501054/normal_5fff6f98c0f87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418381/normal_602b27e7022bc.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
    • https://4123e755-5e7e-4fb8-b167-49ba90d37259.filesusr.com/ugd/fd3290_9aa79edc6bb54a7d97d2dbcb7251c7b8.pdf?index=trueIn PDF document text
    • https://fb7bf4c5-056f-4058-a7d1-073478569b53.filesusr.com/ugd/d90490_a9ef2f3ee931499ea14817d5a47fc987.pdf?index=trueIn 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_off0000dff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF0 5468 bytes
SHA-256: d1d22570f7419e03253f8b62076040c29ce466642b1e358f2d21bec5c905336a
font_01_sfnt_off0000f287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF287 9712 bytes
SHA-256: 741d48ead1cc021c935ca39b6cd91f17582c5775286151e6f17a35efff0ca296
font_02_sfnt_off00011383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11383 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34