Malicious PDF — malware analysis report

Static analysis result for SHA-256 01b1b4fa33dbedba…

MALICIOUS

PDF

151.4 KB Created: 2020-12-02 05:03:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 55ea8aea4bf200d4ae96fbca63b88915 SHA-1: 1f98229cc5f50e5ef4e1db3de73c9b410ae9b406 SHA-256: 01b1b4fa33dbedba372388dafc07c6fe0d319ecbf1a79688663cad5eea285f08
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9982

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 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://trafftec.ru/strik?utm_term=realidades+2+capitulo+1a-5+practice+workbook+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424341/normal_5f9f1d33bc69a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415309/normal_5fc5d26b8fb05.pdfIn PDF document text
    • https://lafapimiwegu.weebly.com/uploads/1/3/4/0/134041150/96150f9eba.pdfIn PDF document text
    • https://tadeganerusoza.weebly.com/uploads/1/3/1/4/131438541/nabasuwigik.pdfIn PDF document text
    • https://nawajago.weebly.com/uploads/1/3/4/6/134621860/duzosulu.pdfIn PDF document text
    • https://xubidanata.weebly.com/uploads/1/3/4/8/134895671/vejikisinegekuxija.pdfIn PDF document text
    • https://fupebabo.weebly.com/uploads/1/3/4/6/134601971/8797186.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464522/normal_5fb45b567caad.pdfIn PDF document text
    • http://www.opentle.orgIn 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://static1.squarespace.com/static/5fbffa571c8c7413142c9acf/t/5fc12ec19b1ed03538066a3f/1606495938946/unique_auto_parts_greenville_sc.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e800a879396864085b93/t/5fc592674e98326c02d06829/1606783593677/california_rules_of_court_word_count_declaration.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3caf68139af0376573afc/t/5fc563bf18e72e5fdb8ce59c/1606771648153/69653178885.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daa8c08c-bd64-4240-83a2-dedda85b3769/gigetep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8cf287c-b672-4fab-bc14-f9bb20da288a/liburuxinoxavabokafewap.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001e4ab.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1E4AB 17376 bytes
SHA-256: eab61604b1067e736d02a39faed78298f2ab50e8fa7b91dbe999c6381b0a1015
font_00_sfnt_off0001c020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C020 5036 bytes
SHA-256: 9b1007858c271718b67be8f96ccf1dd2cfa1cbb401a6666c93388ad8d55a9e08
font_01_sfnt_off0001d186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D186 5592 bytes
SHA-256: 7394f7e43bd4929e9538fc52443b749bf851b97096f09e976d11f6e4feac93ca
font_03_sfnt_off0002139d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2139D 14544 bytes
SHA-256: 4472356d2466764510038bc62b36dadc8e415afa3407dda73f7dd4c3e70aa23e
font_04_sfnt_off0002413a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2413A 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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