Malicious PDF — malware analysis report

Static analysis result for SHA-256 df281709b4dbe915…

MALICIOUS

PDF

82.4 KB Created: 2021-03-15 01:23:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 31c292e2b2fb4dcd02f3e2dec1f9a3b9 SHA-1: d1c0bebbb1d9db8866110f4ae118d550ad8be7dd SHA-256: df281709b4dbe915d4fadf5942b025ce8479578e21fceff28f702f6d5a479634
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://xajibur.ru/wix?keyword=call+of+mini+zombies+mod+apk+download PDF link annotation
    • https://fezapatinegu.weebly.com/uploads/1/3/4/2/134266508/9080813.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450724/normal_604dc2b8523d9.pdfIn PDF document text
    • https://jowesezowu.weebly.com/uploads/1/3/4/3/134366841/logurajufi.pdfIn PDF document text
    • https://ronafipilegov.weebly.com/uploads/1/3/2/6/132681204/9016930.pdfIn PDF document text
    • http://gooddevice-online.com/juwudafat3a7.pdfIn PDF document text
    • https://wegonugu.weebly.com/uploads/1/3/4/0/134040733/dinupula_desatuzipu.pdfIn PDF document text
    • https://kasukironumasex.weebly.com/uploads/1/3/1/4/131454791/c0ee83.pdfIn PDF document text
    • https://sizonijuza.weebly.com/uploads/1/3/4/5/134594560/sedaguvabujogozote.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465392/normal_5ffab1764a11c.pdfIn PDF document text
    • https://wivovisewisapu.weebly.com/uploads/1/3/5/9/135963584/zoligufiw.pdfIn PDF document text
    • http://kzrovk.xyz/peacock_miraculous_transformation_wordsd5fbq.pdfIn PDF document text
    • http://de-bewertung-id2842384.icu/how_to_find_total_dividends_paid_on_common_stockjiygz.pdfIn PDF document text
    • http://makamar.xyz/nuwaronuvukanilewaliu9iyv.pdfIn PDF document text
    • http://stakingyfi.com/45849738011d3gjb.pdfIn PDF document text
    • https://tenasubilojeviw.weebly.com/uploads/1/3/5/9/135993528/kidusajizowituge.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/tenunud/sample_renunciation_certificate_form_india.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/larousse_gastronomique_online.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/63170394807.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/chineke_idinma_song.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/platform_film_ka_video_gana_song.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_off00010262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10262 5344 bytes
SHA-256: c4ae2c8c5bc3dc2f63c9630f352446dc1752a0920fdd853fa21a6d8796dc2e54
font_01_sfnt_off00011494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11494 11420 bytes
SHA-256: 3fc8bc2cb72fd1bf4de5f43c2a97da003a944362feba7747d497f2d3b46f628b

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