Malicious PDF — malware analysis report

Static analysis result for SHA-256 348abf66d84eaa1f…

MALICIOUS

PDF

51.4 KB Created: 2020-11-09 04:53:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 245fa884d1cca9e20dcb3feb8acc795e SHA-1: 64314726ada980c169bfbc75c5cdbc5e52c14fab SHA-256: 348abf66d84eaa1fa1e6c3aad502c1602b7e987ad91384428ba29ae23b0aad97
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://trafficel.ru/aws?keyword=clash+of+clans+guide+2020 PDF link annotation
    • https://vemowidododujev.weebly.com/uploads/1/3/4/3/134353566/1459253.pdfIn PDF document text
    • https://veforolafumokiv.weebly.com/uploads/1/3/4/3/134340642/kubivuvafujefe.pdfIn PDF document text
    • https://fegilekupajot.weebly.com/uploads/1/3/4/4/134404616/1411670.pdfIn PDF document text
    • https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/jupajufokevoju-nojajolixejebez.pdfIn PDF document text
    • https://vifedunujaxali.weebly.com/uploads/1/3/4/3/134398483/kisalelib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369334/normal_5f87b6db63e08.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/sizadagazagaj/weight_lifting_exercises_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/zemipa.pdfIn PDF document text
    • https://felibule.files.wordpress.com/2020/11/41244477441.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/41545476176.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/88319701357.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6172 5364 bytes
SHA-256: 8694a57c18d4e38f2299557b86d56a6d4fb1cc78980b4611179f2aa171e151ba
font_01_sfnt_off000073a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73A8 5996 bytes
SHA-256: 4c5ea676f022efd80f121b5ab443a714a69ac398e871614eb4e59761ec216a76
font_02_sfnt_off00008483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8483 11068 bytes
SHA-256: c4f8755de3923f3bcdfd8f56c3f9b472882bea78a6a3a9cf9ebf909214746d79
font_03_sfnt_off0000aa72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA72 16344 bytes
SHA-256: 9c47a8ecf7103172530608de19fa11afb8a035ab51042e9cb8c6809f09ebb189