Malicious PDF — malware analysis report

Static analysis result for SHA-256 12a4a3e82ae73f35…

MALICIOUS

PDF

79.4 KB Created: 2021-03-03 03:28:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 8c7c9783203e8c46056a9225686bdac5 SHA-1: d4f019d0367e64566eee1c0fbd8224083bf70aec SHA-256: 12a4a3e82ae73f357a7659b10b7dcd4fc5c0ed1ec4eb28f08a0933f9582d5c02
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/123?utm_term=what+is+analytics+definition PDF link annotation
    • https://xafijedalab.weebly.com/uploads/1/3/0/7/130775792/5b87953f9086c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460473/normal_5ff7c671588bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445325/normal_603260d5e1216.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454184/normal_5fe5d724df779.pdfIn PDF document text
    • http://bavomobes.22web.org/luzolozijitamete.pdfIn PDF document text
    • https://zixavuxo.weebly.com/uploads/1/3/1/3/131398386/862801.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495395/normal_600e9cb137c95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459463/normal_600d411a4601b.pdfIn PDF document text
    • https://vojisijekedix.weebly.com/uploads/1/3/5/3/135311469/nivisumopab.pdfIn PDF document text
    • https://berebexamoleti.weebly.com/uploads/1/3/1/3/131384136/3802912.pdfIn PDF document text
    • https://zefimaral.weebly.com/uploads/1/3/0/7/130776827/vanitafifexo.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/bidivo/android_messages_2._9_apk.pdfIn PDF document text
    • http://xupozivuruvuti.rf.gd/sohcahtoa_story_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/pokixovuxik/articles_of_association_template_estonia.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/40599473166.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/daily_activities_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/bewerudiza.pdfIn PDF document text
    • http://migusopugaj.epizy.com/riscos_ocupacionais_na_construo_civil.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_off0000f4a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A6 5128 bytes
SHA-256: e57aa46dfe62914b4778907b2c26b5943d5272059a5dbed6a23a5892ecd401cb
font_01_sfnt_off0001062f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062F 12808 bytes
SHA-256: 3981377b0a574cf58e292d21f1c6cbcd16ae3adce0eb066ac36a1ff38ef3ef69