Malicious PDF — malware analysis report

Static analysis result for SHA-256 9107e92f9a8c7f3f…

MALICIOUS

PDF

85.5 KB Created: 2021-02-27 01:59:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ea8f933fc2061cddaa01b379e9bbf881 SHA-1: 2badc37a3aa16084a21038e3685f2c8b0d21879e SHA-256: 9107e92f9a8c7f3f9afaa6b8613d993ff3a6b881687eccd00c6185cafad784d8
252 Risk Score

Malware Insights

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

This PDF file contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm. The presence of a malicious redirector URL and ClamAV detection strongly suggests malicious intent. The document's structure and embedded links indicate it's designed to trick users into navigating to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://yafferge.ru/wix?keyword=it+chapter+2+drive+mp4+download In PDF document text
    • https://penogefuf.weebly.com/uploads/1/3/2/7/132740618/6899316.pdfIn PDF document text
    • https://zelowomuguzak.weebly.com/uploads/1/3/1/3/131379017/579cb.pdfIn PDF document text
    • http://nageramuvepom.mywebcommunity.org/libro_cien_aos_de_soledad_de_que_trata.pdfIn PDF document text
    • https://bogibopedazite.weebly.com/uploads/1/3/4/0/134018154/6649403.pdfIn PDF document text
    • https://jutifakakunule.weebly.com/uploads/1/3/5/9/135985430/2791317.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454424/normal_60051f3228115.pdfIn PDF document text
    • https://lupudeme.weebly.com/uploads/1/3/1/3/131378919/varabetuvijuda_denolomiwixave_wususoxitu_kurun.pdfIn PDF document text
    • https://rujunile.weebly.com/uploads/1/3/2/7/132710621/4eb0b5.pdfIn PDF document text
    • http://xawegap.mywebcommunity.org/que_es_la_linea_de_alba_en_el_embarazo.pdfIn PDF document text
    • https://cdn.sqhk.co/zaviresodew/AIjczkF/26734435128.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383802/normal_5fc878305ccc5.pdfIn PDF document text
    • https://cdn.sqhk.co/tajugajobib/jetyjbF/business_development_manager_role_profile.pdfIn PDF document text
    • https://xazulifego.weebly.com/uploads/1/3/4/7/134727283/wudejavin.pdfIn PDF document text
    • https://rakamukomegu.weebly.com/uploads/1/3/2/6/132681656/7cfe472c45ecb22.pdfIn PDF document text
    • https://fawesilabe.weebly.com/uploads/1/3/2/6/132680990/63d6c6cc7df1b82.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9B 5444 bytes
SHA-256: f8ee1c9518652c5c0aaf43dcdb75cdc9b54e1163ee19e07ddc2145a6a15466cb
font_01_sfnt_off0001110f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1110F 10152 bytes
SHA-256: 2a7c89698a030f5d57b855835c8d070f7a46acc5963717ab305e88dc80276b8f
font_02_sfnt_off00013413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13413 16112 bytes
SHA-256: 94a2e64bc7cb242413bf0b9a168543d2d9e66e6da816ec022791ad488a02fc3d