Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9580b0dc7a2f816…

MALICIOUS

PDF

80.0 KB Created: 2021-03-10 15:51:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: cf5e3267efe3634e910516a8f1fbc4cd SHA-1: 5b937df7181c499de0779917c10becaadeff95d9 SHA-256: d9580b0dc7a2f8169e69dd7b92ff669fae51b3a109a31f29ee85634d0a6d562a
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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://jumiwimov.ru/strik?utm_term=apple+time+capsule+replacement+parts PDF link annotation
    • http://rarubife.mygamesonline.org/the_circuit_francisco_jimenez_quotes.pdfIn PDF document text
    • https://nupuwumot.weebly.com/uploads/1/3/5/3/135305030/f2ab1b02.pdfIn PDF document text
    • https://jarosebat.weebly.com/uploads/1/3/4/6/134695718/209f7b661362b.pdfIn PDF document text
    • http://axecheat5.xyz/68092840353wdean.pdfIn PDF document text
    • http://vepenuvix.mygamesonline.org/the_odyssey_book_2_study_guide_answers.pdfIn PDF document text
    • http://static-start.top/what_is_a_progressive_claims_adjuster_traineeydjge.pdfIn PDF document text
    • http://jepenufi.getenjoyment.net/dnd_5e_best_campaigns_for_beginners.pdfIn PDF document text
    • http://sewakasatixori.medianewsonline.com/gajubofobakufamupamofob.pdfIn PDF document text
    • https://tabetigilazewa.weebly.com/uploads/1/3/5/3/135392987/tosoxiririvigu_fanedowixopizin.pdfIn PDF document text
    • http://mopowataxix.medianewsonline.com/black_and_decker_food_processor_replacement_parts_fp1800b.pdfIn PDF document text
    • http://ronifibofizet.medianewsonline.com/31206675512.pdfIn PDF document text
    • http://mishabelle.ru/pabusofusumonalekafok8hqvt.pdfIn PDF document text
    • http://xemizawufogutuf.scienceontheweb.net/how_to_make_a_vrchat_avatar_from_scratch_2020.pdfIn PDF document text
    • http://kirakexig.mypressonline.com/kobed.pdfIn PDF document text
    • https://nobaletakalesig.weebly.com/uploads/1/3/2/3/132302751/194112.pdfIn PDF document text
    • http://xufededubumavif.scienceontheweb.net/como_se_hace_un_manual_de_usuario.pdfIn PDF document text
    • http://gopusoduj.mygamesonline.org/24201056500.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
    • http://netomadutimafe.onlinewebshop.net/liwuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f63cefcb-e694-41f5-948a-e26a109e17b5/40724062621.pdfIn PDF document text
    • http://zejusamipokera.myartsonline.com/wuwulokudifu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58cb2cc5-ef82-488e-87aa-e786ce638804/motefulut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49a634f3-7b9e-4cd6-a7e2-b52b827483bd/why_is_my_apple_airport_express_so_slow.pdfIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/rubopojobekojosuxupu.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_off0000f12b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12B 4840 bytes
SHA-256: 1f676bf88e1fd6a669294966825697655eeb9f4c238ed651438dc1d516d40aa8
font_01_sfnt_off00010179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10179 10116 bytes
SHA-256: a51b437f6e7ee66cc0171d84f7a91d08ef284754f77eedc474f8b33c12df7d83
font_02_sfnt_off00012416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12416 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176