Malicious PDF — malware analysis report

Static analysis result for SHA-256 6568b1575fab5513…

MALICIOUS

PDF

103.1 KB Created: 2021-03-29 06:51:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 0d7ad00dc3515e642ece5ea0dc98118a SHA-1: b80082967d1a962aadde133ec930b35b10b196ac SHA-256: 6568b1575fab5513b76d6ac0f522b0235ace8485b468e5549b3af7edc406787b
214 Risk Score

Malware Insights

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

The PDF file contains a lure related to a 'smartwatch manual' and embeds a link to a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://yafferge.ru/123?utm_term=aosmart+smartwatch+manual In PDF document text
    • http://vedivux.mygamesonline.org/ceiling_catalogue.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369653/normal_5ff2a5cf90915.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446633/normal_605678ef38894.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388619/normal_60263f61e05fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486033/normal_6037633a41dbe.pdfIn PDF document text
    • http://lebizifijafaxim.medianewsonline.com/2020_cadillac_srx_owners_manual.pdfIn PDF document text
    • http://nutapobo.iblogger.org/buckie_high_school_uniform.pdfIn PDF document text
    • https://cdn.sqhk.co/sebuwemid/HifmAuY/38301372796.pdfIn PDF document text
    • https://cdn.sqhk.co/nivavepe/BH5ifgi/fire_and_glory_book.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://s3.amazonaws.com/dapekufoxiraku/12732008307.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24cce380-0ca2-4aea-b3e9-667cc72e2c55/tixidexi.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/good_luck_chuck_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7877d5b-dd7d-4119-be92-85a51e03bc79/39037489152.pdfIn PDF document text
    • http://pikezega.epizy.com/40219675453.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/fun_math_activities_worksheets_for_kindergarten.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/what_is_the_main_idea_of_the_federalist_10.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/is_my_cousin_rachel_on_netflix.pdfIn PDF document text
    • http://wesatume.atwebpages.com/caries_dental_diagnostico.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14735 4836 bytes
SHA-256: 490bc3b61b9edf552a82c43c534d12d5361d630cd36488b84b24b3f5d867b61c
font_01_sfnt_off0001577d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1577D 12544 bytes
SHA-256: 01896afc13298f1a03c8b07cd4e9f6196f84391892947357372fe3a1ea1296b4
font_02_sfnt_off00018131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18131 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2