Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc34a21c61ee15db…

MALICIOUS

PDF

73.2 KB Created: 2021-03-05 04:18:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: b0e8b9a14d7400e7bcdf7c8047480f9b SHA-1: bfe9d53e53ecba05218afc06ed7de61f8f89d995 SHA-256: bc34a21c61ee15dbed66518fc43ec0e43f19ed4974daa72ddb5e09811532950e
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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/award?keyword=kindle+lending+library+uk+how+to+return+a+book In PDF document text
    • https://static.s123-cdn-static.com/uploads/4428083/normal_5ffd2f3b6017a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471509/normal_5fe7870a6ece9.pdfIn PDF document text
    • http://sosiwawivijomo.scienceontheweb.net/bella_4_slice_belgian_waffle_maker_reviews.pdfIn PDF document text
    • http://sawedes.mywebcommunity.org/does_a_crp_blood_test_show_cancer.pdfIn PDF document text
    • http://kamikofonem.mygamesonline.org/star_wars_galaxy_of_adventures_ahsoka_tano_figure.pdfIn PDF document text
    • http://wewogokuwidu.mywebcommunity.org/kedidefuxalupeba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379049/normal_5ff06ff03f1a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455403/normal_5fdfcd3ab01b6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/33287247479.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/24244419754.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/bird_song_mnemonics_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/wodewad.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/paige_bueckers_hopkins_jersey.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/zolopam.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/ethyl_chloroformate_density.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/59904002491.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/xavawanivinidideraxoribo.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/gmail_app_in_jio_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/what_can_fluid_dynamics_be_used_for.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_off0000e19f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE19F 5276 bytes
SHA-256: 69c6709c3cd42ef2722f36102ed192dca4bf880834b77874f1479fa8fb2e6b11
font_01_sfnt_off0000f39d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF39D 10492 bytes
SHA-256: f9d6dfb20534a6295333e721d8a389904cf4a10a501a3f62c1effd56f29b808c

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