Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9f5b3729e503b55…

MALICIOUS

PDF

45.8 KB Created: 2020-10-26 15:53:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 5839feba46260150612f339fc79a3586 SHA-1: 006f9f054171cb1a9d674e8a8e6a974110960188 SHA-256: a9f5b3729e503b553ae5c0519d54780cbbf0b09530d11d9c5f048f262678edb4
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ttraff.cc/pify?keyword=measure+maps+pro+apk In PDF document text
    • https://fidevawane.weebly.com/uploads/1/3/0/8/130814252/sodiwenavugajot_dusat_xalezasesipir_jagapi.pdfIn PDF document text
    • https://fiwatinizajof.weebly.com/uploads/1/3/0/8/130874156/fogevegorobapagez.pdfIn PDF document text
    • https://pitamiled.weebly.com/uploads/1/3/4/0/134098016/7986127.pdfIn PDF document text
    • https://bakuwosir.weebly.com/uploads/1/3/0/8/130874569/disibub-nosibevile.pdfIn PDF document text
    • https://wajiresejepo.weebly.com/uploads/1/3/0/7/130774962/9e092558626df9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/0150/3897/files/47353367290.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7790/3551/files/xadibasanabaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8304/5293/files/proof_divergence_theorem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/3167/1196/files/competency_based_pay.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4456/8220/files/velelekez.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/apologetics_books.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/cecil_textbook_of_medicine_25th_edition_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8526/1717/files/toremazefadovate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3160/0538/files/applied_kinesiology_books_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/4821/1895/files/zixosilimiwomejar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3162/5882/files/cara_download_mp3_di_hp_android_samsung.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4647/2342/files/bomefuduzukolafesufa.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/35432189188.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/bibubizekirepup.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/treatment_of_tuberculosis_disease.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/gst_accounting_rules_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/gogusezaxewejopusenije.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1235bb97-1842-44c8-a338-6edd4cac4fd2/26014170626.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9990d1f0-aa57-4436-bef8-3e4b830fd59d/65181974338.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7291 5004 bytes
SHA-256: dd82da92267f62e8521e28847d325a440598edefd9efebec82647201a4f0b50b
font_01_sfnt_off00008382.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8382 11536 bytes
SHA-256: 872b736cfc623fb6e987e7ee878e3344fc45d52fad89cb276cb77942ead80d58