Malicious PDF — malware analysis report

Static analysis result for SHA-256 39852c6b49b998fd…

MALICIOUS

PDF

78.8 KB Created: 2021-04-07 15:10:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 023edc9d7785fedae005ba229ce86726 SHA-1: c8f88894669fac7ca62b113815ffe0e370463c4f SHA-256: 39852c6b49b998fd359fd04bf45a6a9a6af6d0758a7e8f739b668986fad64a58
156 Risk Score

Malware Insights

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

The PDF contains a lure related to obtaining a private detective license, which is a common tactic for phishing or scams. It directs users to an external URL, identified as a redirector, likely leading to a malicious payload or phishing page. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://xezojetit.ru/strik?utm_term=how+to+get+a+private+detective+license+in+georgia PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4377102/normal_5fee67f366b73.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460231/normal_5fe4e1dc68763.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409997/normal_605ddac219c74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477147/normal_6031657291050.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421038/normal_6043fc491ba9c.pdfIn PDF document text
    • http://winoraama.site/mean_dreams_movie_parents_guidebq20f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450421/normal_5fcef25fe0d06.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426263/normal_5ffe419ea1d7a.pdfIn PDF document text
    • http://inscarusa.info/xavixumuucstu.pdfIn PDF document text
    • http://dietnatur.fun/w3schools_python_if_loopwqvks.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424985/normal_6054df22914be.pdfIn PDF document text
    • http://hotloveme.online/theories_of_entrepreneurship_motivationbzaiz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404122/normal_5fde9d825ade3.pdfIn PDF document text
    • http://mazanatur.space/james_stewart_multivariable_calculuso5glf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e05d936a-89bb-4506-a341-6ddd47e9ab03/84415222760.pdfIn PDF document text
    • https://s3.amazonaws.com/jizubisetebof/like_wap_telugu_video_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/70674946711.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/what_is_the_measure_of_a_great_manglesrt__degrees.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8baead6-70c3-4f4f-be7c-11b37d8ea088/what_is_a_care_delivery_model.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/schwinn_exercise_bike_accessories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c9e16da-eb6e-40a1-8ad7-bff1d32b313e/56772764340.pdfIn PDF document text
    • https://0a9d52b7-bae8-445b-b6d2-8eba0f02533c.filesusr.com/ugd/729231_e9dd448963de4c56a22a93033554e336.pdf?index=trueIn PDF document text
    • https://af0fe010-594a-4ec7-a26b-e2d78e33490d.filesusr.com/ugd/7d2910_875c9fc6dffe48e1a8d8fc58858cdb05.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BF 5356 bytes
SHA-256: 49c5671a671faf3cf1ac190ee7a2c4213d7734995907b5bd4a5e685d300c56ab
font_01_sfnt_off0001071f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1071F 11252 bytes
SHA-256: 4303ef3ad81b3b94907d44c2be465b2d7e9bbc0f931c22e9dd16cdd5b4b6e4c3