Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5edc7055a6ff211…

MALICIOUS

PDF

72.2 KB Created: 2021-01-15 01:11:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 41806df8a7a61f1b375ca70c31b76a52 SHA-1: c60addad06617609832971f1b50455294388b109 SHA-256: a5edc7055a6ff21183df43a8287e6e3247a45f341ccae635e88812bac0d15e74
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged by multiple critical heuristics as malicious, including a redirector link and a large link farm. The embedded URLs, such as https://cctraff.ru/aws?utm_term=chamma+chamma+song+video++pagalworld.+io, likely lead to phishing or malware distribution sites. The document's structure and content suggest it is designed to lure users into clicking these links, potentially leading to further compromise.

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://cctraff.ru/aws?utm_term=chamma+chamma+song+video++pagalworld.+io In PDF document text
    • https://bufasadapigeze.weebly.com/uploads/1/3/4/3/134307931/nezebopewat.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/mekugar.pdfIn PDF document text
    • https://pakefexudexabe.weebly.com/uploads/1/3/0/9/130969404/2811297.pdfIn PDF document text
    • https://site-1166749.mozfiles.com/files/1166749/first_4_words_of_the_declaration_of_independence.pdfIn PDF document text
    • https://site-1178208.mozfiles.com/files/1178208/evansville_teachers_credit_union_loan_payment.pdfIn PDF document text
    • https://wivixape.weebly.com/uploads/1/3/4/8/134897282/siwojinenev-xivow-bumuga.pdfIn PDF document text
    • https://sagabeju.weebly.com/uploads/1/3/4/6/134659190/5029e89b9811bb.pdfIn PDF document text
    • https://towetebofipu.weebly.com/uploads/1/3/1/4/131437669/fizasolunajik.pdfIn PDF document text
    • https://cdn.sqhk.co/pixafosabow/JjcQje0/top_10_everything_2019.pdfIn PDF document text
    • https://fapovodulutob.weebly.com/uploads/1/3/4/3/134361236/vixuf.pdfIn PDF document text
    • https://wadezadoli.weebly.com/uploads/1/3/0/9/130970015/3a114551d5988ca.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/vovopafubipu/boney_m_daddy_cool_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/borderlight_wallpaper_for_android.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC8A 5576 bytes
SHA-256: 99b5778e5c125a67b1125f3c95e3c4fda7ee225f2a82568dd10b6b2b5898a1da
font_01_sfnt_off0000ef68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF68 10856 bytes
SHA-256: b0ffe6b98a010cb8b36dc7a9e6124b2cbcd7303e9f76a7ce892dae5ee27386ee

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