Malicious PDF — malware analysis report

Static analysis result for SHA-256 8edcb66738cf4abe…

MALICIOUS

PDF

68.3 KB Created: 2021-02-24 09:33:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: f58355a9fca37c17c26a6f0e8d8fb170 SHA-1: 02a57d30cdcdaf0d0626f97840b1eafe8cdf86e5 SHA-256: 8edcb66738cf4abe8779b3f99c3c2b7d98351f95fed9fb570413caac95da0939
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://baarspo.ru/wix?keyword=baby+bjorn+bouncer+balance+instructions PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4499656/normal_6026d0296fa79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473654/normal_60183f37dda08.pdfIn PDF document text
    • http://wuzubofetaxoger.iblogger.org/bosch_nexxt_500_plus_series_washer_spin_cycle.pdfIn PDF document text
    • https://nixixufusolawig.weebly.com/uploads/1/3/4/8/134882604/rakugatujebuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471099/normal_6018c2e789036.pdfIn PDF document text
    • https://rujusuxiledajo.weebly.com/uploads/1/3/4/8/134861970/e619096dc.pdfIn PDF document text
    • https://sedawuxel.weebly.com/uploads/1/3/5/3/135326539/7430188.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/gowupuzokowuxes/xifobisokepajawugunuvije.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/mixed_parallel_and_series_circuits_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/cannibal_holocaust_full_movie_free_mp4.pdfIn PDF document text
    • http://bexumonege.rf.gd/how_to_change_time_on_flip_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/behavioral_activation_worksheet_spanish.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/97801081243.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/jazemisizikukigetava.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_off0000c142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC142 5040 bytes
SHA-256: db6b6ac9290c9f636c3f96ca83b5ce1dd60e85dad1dace9a04a1edd438c05396
font_01_sfnt_off0000d276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD276 10288 bytes
SHA-256: 5b1941b35c0169fbc2b6dd8150ccf22960d2c7d32f24b9a91895a94a87d22e0d
font_02_sfnt_off0000f5ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5AB 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c