Malicious PDF — malware analysis report

Static analysis result for SHA-256 d85739605899b4ac…

MALICIOUS

PDF

72.1 KB Created: 2021-02-19 23:02:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: f440cb34afd4dc0b319e2bf9efa0aaa8 SHA-1: d05e5754039f1fd38f42b00e4c65f029e2212252 SHA-256: d85739605899b4ac8cca929434546fa982ff8db76d2220a644e6c26093efe363
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://maypoin.ru/wix?keyword=bill+nye+buoyancy+worksheet+answer+key PDF link annotation
    • https://bapefakujina.weebly.com/uploads/1/3/4/4/134483882/lisovo.pdfIn PDF document text
    • https://rakevuxex.weebly.com/uploads/1/3/4/0/134040666/c548a95.pdfIn PDF document text
    • http://replyua.site/workplace_safety_inspection_reportjosv9.pdfIn PDF document text
    • http://how2clever.com/lasko_22.5-in._ceramic_oscillating_tower_heater_reviewsh8yi0.pdfIn PDF document text
    • http://shopyou.online/devi_bhagwat_puran_in_sanskrit_with_hindi_translationp3cb8.pdfIn PDF document text
    • https://wojaginobaxap.weebly.com/uploads/1/3/1/8/131857211/rebes.pdfIn PDF document text
    • http://itprod.space/527097203085s7mp.pdfIn PDF document text
    • https://xasigusuvenazuj.weebly.com/uploads/1/3/0/7/130739755/8774001.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499995/normal_6022cb889974d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367302/normal_5ff48559b62c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463533/normal_5ff0810fcc984.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/dazifozixawus/42943936895.pdfIn PDF document text
    • http://nepunefetonub.epizy.com/31512712155.pdfIn PDF document text
    • http://momugegunimex.rf.gd/21933243163.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/pijinususikabefete.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/43766120236.pdfIn PDF document text
    • http://kojuvubij.rf.gd/jodiji.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/gowed.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/kamopebopoge.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_off0000cfcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFCB 5216 bytes
SHA-256: 5b942a509af2505f90c56da8e209c0e2cc0b255a44af4b50daaf3ece17fc328c
font_01_sfnt_off0000e191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE191 10316 bytes
SHA-256: abd31958f7315ea34d40a24f18480d8c728115cc441fbd0538706021744337bd
font_02_sfnt_off000104c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C2 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c