Malicious PDF — malware analysis report

Static analysis result for SHA-256 79f8a1e869611c84…

MALICIOUS

PDF

68.3 KB Created: 2021-03-04 13:30:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: aee9cc9bb7418914029b5d4edf8bf0f3 SHA-1: 56a3e1f1f8fd3c8354722f5506b2eef071f3ed9c SHA-256: 79f8a1e869611c841ab4ed4b41c8dee66632c94ae2cf9fb45e642ade38517058
244 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
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dafemum.ru/award?keyword=accu+chek+performa+softclix+lancets In PDF document text
    • http://pedron.fun/lovely_complex_episode_1_english_dubbed9ke2p.pdfIn PDF document text
    • https://tobadagagu.weebly.com/uploads/1/3/4/7/134750152/9661786.pdfIn PDF document text
    • http://livecopyrightverification.com/exercices_sur_ladn_support_de_linformation_gntique0gzn4.pdfIn PDF document text
    • https://cdn.sqhk.co/gatidixon/ibkijgs/23352909831.pdfIn PDF document text
    • http://goossyy.online/artemis_fowl_trailer_2019as60k.pdfIn PDF document text
    • https://gonufefimexej.weebly.com/uploads/1/3/4/8/134892828/mipobir_midoruxojirifat_sojuki_laxiw.pdfIn PDF document text
    • http://mastera-saydinga.ru/65302053625i2f4k.pdfIn PDF document text
    • https://nogapixefakul.weebly.com/uploads/1/3/4/5/134590999/solikajunefaladul.pdfIn PDF document text
    • https://cdn.sqhk.co/kagumuzom/eagjbh4/buddy_throw_mod_apk_unlimited_money_download.pdfIn PDF document text
    • https://kedaregedowe.weebly.com/uploads/1/3/5/3/135321867/nerituvokibosenixa.pdfIn PDF document text
    • http://cardio-natural.info/marvel_schebler_tsx_33_carburetor_adjustmentk2wvi.pdfIn PDF document text
    • https://cdn.sqhk.co/sojuzafu/jcehjAW/73018613436.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/vasofirida/barcode_scanner_app_android_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/gmail_email_template_generator.pdfIn PDF document text
    • https://de315c38-daa2-4293-b666-e554ba9b7d65.filesusr.com/ugd/564d2e_639b8b79644d4335aa8e5c23b9b02b5e.pdf?index=trueIn PDF document text
    • https://204833c8-abda-4421-8777-5048ee7dd919.filesusr.com/ugd/e30b7a_d45bb450c3104a79b1e203aa6665051c.pdf?index=trueIn PDF document text
    • https://6b52f5a6-db44-4d3e-8337-ab33c729cb13.filesusr.com/ugd/f4de5e_fac93b3b7aa94fbbb0d088a2e62b8070.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xetasif/bamexerigomovugumuwadage.pdfIn PDF document text
    • https://66c7139a-03c0-45fe-98d3-e817d1e01442.filesusr.com/ugd/de2db5_6978b7a84a97451f84f3ecb7415fafa0.pdf?index=trueIn PDF document text
    • https://626fb5af-1d67-41cb-86ce-204163677ff0.filesusr.com/ugd/9d869b_cbc7ea6e450f446b90654f774ca5a649.pdf?index=trueIn 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_off0000cda5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA5 5376 bytes
SHA-256: 36007a136743cc0c9ec7de8ac03ce475d2d75c29b5f1ff1e4f2940ed60a5f847
font_01_sfnt_off0000dfc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC4 10736 bytes
SHA-256: 5aed4a38c884fb27bb5af2a814faf28c37ce974734749479a3deb2a10d8a3b32