Malicious PDF — malware analysis report

Static analysis result for SHA-256 19ed6f05e13ed5bb…

MALICIOUS

PDF

86.0 KB Created: 2021-05-17 02:05:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 89e08b57f02aa78858f48956774eaf37 SHA-1: fbe16d13ff3c75059f6cb6469fe4f41abc1bfa7f SHA-256: 19ed6f05e13ed5bba0d04617848937bd744c0a0f8ed3faf639667dab92991708
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links point towards a common phishing or malware delivery technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://druttle.ru/strik?utm_term=husqvarna+hu775h+parts+manual PDF link annotation
    • https://cdn.sqhk.co/xavaxonad/hjjic7U/wegapekumegomefetoxixazus.pdfIn PDF document text
    • https://rojilijeliw.weebly.com/uploads/1/3/1/4/131409822/pogosanezexe-pivutexa-worubeju-zavipesesutigup.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470836/normal_6056e8d4a9e71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380523/normal_604aabcc82b90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417314/normal_6012e2e0de64c.pdfIn PDF document text
    • https://kidenido.weebly.com/uploads/1/3/1/6/131636891/1234307.pdfIn PDF document text
    • https://cdn.sqhk.co/banamasuvaj/gIididJ/1092920798.pdfIn PDF document text
    • http://optarfes.com/6538453891mbwas.pdfIn PDF document text
    • https://bodupojuribun.weebly.com/uploads/1/3/4/7/134758420/9626469.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453909/normal_603b496160031.pdfIn PDF document text
    • http://precabinets.xyz/anaconda_full_movie_dual_audio_480po2zu2.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://2ffa788b-df2f-461f-b9c5-573bec542745.filesusr.com/ugd/374ce0_b280f485c0014cc494387caf61f7dfd3.pdf?index=trueIn PDF document text
    • https://5cbbff6b-7c47-4fbb-abda-9de5069fbc88.filesusr.com/ugd/1a89c8_fe6dc5d672a044ecb939b437fe3f7f72.pdf?index=trueIn PDF document text
    • https://c1908cc8-b41e-4b5b-ab1c-53d28a7f2745.filesusr.com/ugd/913720_51a362abbbb64ec4b54a3a4b8756d19b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/sony_a77_camera_review.pdfIn PDF document text
    • https://438e95ed-c264-4db5-88d3-1a9ca8b91b86.filesusr.com/ugd/733c1f_cfb80598d6c644b5a617024fdaf508a1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/bed_sheets_on_sale_queen.pdfIn PDF document text
    • https://ebba3e40-d49f-4cc8-b137-373bb1124918.filesusr.com/ugd/384ea4_9f6a104a221b4c35b172c80839fbe05a.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_off0001073a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1073A 5016 bytes
SHA-256: b89da1b1bb1f74de744b32439073354e3264b4271a55436bfc319ca4354e1f9a
font_01_sfnt_off0001181b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1181B 10236 bytes
SHA-256: 50eb01a158c347822809b218b85a28700e095fcd2adedd401a83e03fe5c137d5
font_02_sfnt_off00013b03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B03 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333