Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b3784ea0fe54a96…

MALICIOUS

PDF

62.8 KB Created: 2021-01-11 13:39:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: e713cde4bfaee5900aa5a17c82c4754e SHA-1: 9f00b314dc8e23c5bbbe592a928daecd7a4b2b37 SHA-256: 4b3784ea0fe54a968847de1ae665aae22113b45b8cad6637103393e4733be6d7
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a known malicious domain, identified by multiple heuristics as a redirector for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to contain lure text related to popular search terms, suggesting a phishing or social engineering pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/aws?utm_term=chandigarh+police+punjabi+song++djpunjab In PDF document text
    • https://site-1178256.mozfiles.com/files/1178256/sazigip.pdfIn PDF document text
    • https://site-1166042.mozfiles.com/files/1166042/7_wonders_of_the_world_ancient_and_new.pdfIn PDF document text
    • https://cdn.sqhk.co/kimejijomaki/0a0gjVU/ice_cream_cake_dairy_queen_recipe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409103/normal_5f931629511aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375071/normal_5f919d288d5af.pdfIn PDF document text
    • https://site-1178403.mozfiles.com/files/1178403/farming_simulator_2018_mod_apk_obb.pdfIn PDF document text
    • https://site-1176306.mozfiles.com/files/1176306/84815675328.pdfIn PDF document text
    • https://cdn.sqhk.co/roxigeve/1oMjbii/39253191850.pdfIn PDF document text
    • https://site-1178726.mozfiles.com/files/1178726/sovobaxilagirede.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/gazivemon/70506341560.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/diltiazem_davis_drug_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/43524467443.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/69584434036.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/wujirofuwu.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/22679532151.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/comments_for_report_cards_for_preschoolers.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b7ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7AE 5456 bytes
SHA-256: c9a7bcb4d425107b851ca844fa7fbde01fcc4b707ddd7a8d2cdd27ed697a410a
font_01_sfnt_off0000ca2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA2C 10280 bytes
SHA-256: 174b9a674ed0a71ec9fb2dc309e374b1b3d073f51cb395c8c7bd25e62dfdbff5

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