Malicious PDF — malware analysis report

Static analysis result for SHA-256 59b6f6aa6e867a9f…

MALICIOUS

PDF

66.3 KB Created: 2021-02-12 05:28:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 310ebcbb9f9c8418e0a933ce2ac9d134 SHA-1: 465d24a12d395b85b2770c298b202a6d7f4767b9 SHA-256: 59b6f6aa6e867a9fbad3e4c2ee7bf75dc90351ef0421fc8e13951e26b72245e0
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/wix?keyword=mitosis+and+meiosis+quiz+answer+key PDF link annotation
    • https://temerineg.weebly.com/uploads/1/3/0/9/130969052/regisiripenanujuken.pdfIn PDF document text
    • https://bofejaximolapob.weebly.com/uploads/1/3/4/7/134751884/6750090.pdfIn PDF document text
    • https://wosobariwosamu.weebly.com/uploads/1/3/4/3/134372044/dapukaxosetinip-masaguzos.pdfIn PDF document text
    • https://kurinasuvofete.weebly.com/uploads/1/3/5/3/135334761/bimadepilevep_rizumidavikexo_jotadamebosume_tiziri.pdfIn PDF document text
    • http://ritikutoxukor.22web.org/giketexabedezusilan.pdfIn PDF document text
    • https://sinekagu.weebly.com/uploads/1/3/4/8/134855021/fukusuputepinekix.pdfIn PDF document text
    • https://funogumoduwe.weebly.com/uploads/1/3/4/3/134309977/xifidedewimoxo.pdfIn PDF document text
    • https://disefiduwixa.weebly.com/uploads/1/3/5/9/135981448/siwuvopiwefinakijure.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/gorajikunobixi/dose_response_curve_lab_report.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/carols_of_the_bells_song.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/witagesorikupon.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/estoppel_letter_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/jatemodamisasubapa.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/18833095513.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/catalizadores_heterogeneos.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/bus_chassis_design.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/abordagens_humanistas_em_psicologia.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_off0000c75d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC75D 5380 bytes
SHA-256: 6b3293b7f9648d12acdb2783e618d7be06d48a8b44f9dd59141d4d5f88874ea1
font_01_sfnt_off0000d9b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B9 10128 bytes
SHA-256: 6652e94c44e358134f2955f9ae51bb134c6ba318630b055b4ca2fa160af80be9

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