Malicious PDF — malware analysis report

Static analysis result for SHA-256 00fa75e485429981…

MALICIOUS

PDF

88.3 KB Created: 2021-03-17 17:23:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 81db8c7b8569f979a83a608355aecb7c SHA-1: 1b634593b5bb8cfcefac79735bcfb16365e5d0be SHA-256: 00fa75e4854299815925bb20f498a09933f59f17346b0a300a8fc88cc9d1b159
186 Risk Score

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 0.9990

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.
  • 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.
  • 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://resalured.ru/award?keyword=tongue+twister+sentences+pdf PDF link annotation
    • https://zakemobuka.weebly.com/uploads/1/3/0/7/130775752/1999777.pdfIn PDF document text
    • https://pigukoziluluz.weebly.com/uploads/1/3/4/8/134896600/fofaje.pdfIn PDF document text
    • http://mamontov-net.cc/xixuzamovakijowjok2.pdfIn PDF document text
    • http://lololoj.sportsontheweb.net/how_to_volunteer_at_a_hospital_with_babies.pdfIn PDF document text
    • http://levelupguild.com/4858990911nisgr.pdfIn PDF document text
    • https://cdn.sqhk.co/xawodoze/iB4hhid/dragon_racer_2.pdfIn PDF document text
    • http://gakukuketisalum.scienceontheweb.net/gadojosotasekunimira.pdfIn PDF document text
    • https://cdn.sqhk.co/zefafulolit/iagdjaw/85637679802.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/hbLhiK1/vampires_wife_dress_h_m.pdfIn PDF document text
    • http://fitnesspack.net/tetavejavonuvemujotovidmcc78.pdfIn PDF document text
    • http://leqqurint.online/392475058811xxhp.pdfIn PDF document text
    • https://cdn.sqhk.co/xeduwukaxusa/gidDgch/sadafizajexoxob.pdfIn PDF document text
    • https://cdn.sqhk.co/nijedesakuj/Najj9hg/hit_or_miss_meme_roblox_id.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://85fc0914-20e3-4f1c-be8c-de7e6f89f47e.filesusr.com/ugd/a44510_46fa7909af9542c6adb4fe771e4c7ac6.pdf?index=trueIn PDF document text
    • https://f1fb087f-5d49-4061-aa02-230b108315d3.filesusr.com/ugd/645068_7534f11e0b954a82a127dde172924da4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/vipolazamapepajage.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/47182900181.pdfIn PDF document text
    • https://e6b56e3c-1b88-4cfb-972d-ab1702b0a06e.filesusr.com/ugd/8c0e65_f599b156fae741f483eb512e214b8871.pdf?index=trueIn PDF document text
    • https://c5e26362-acc3-4c40-9db4-ce0cbd355080.filesusr.com/ugd/681527_873ac7690c6a4ef1b576ae85fa70a24d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/57250386772.pdfIn PDF document text
    • http://lebusepuwiri.atwebpages.com/fexobefidepirodetevufu.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/cartoon_cute_girl_wallpaper.pdfIn PDF document text
    • https://8488b7ac-84bc-45ae-88ed-26841205fc59.filesusr.com/ugd/7cda3c_cef3e1ecf2f94f89a3d8a684645ca8ed.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11019 5004 bytes
SHA-256: 8651c59459e7c74180c69ee6c5ea37bb9868911e3246225adf4ef58df9cc31e7
font_01_sfnt_off00012145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12145 10792 bytes
SHA-256: b433147137065cf23eb8df256d65f105f26203ea617f01277c2ffd4ef508049a
font_02_sfnt_off000145f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145F2 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c