Malicious PDF — malware analysis report

Static analysis result for SHA-256 daf1e69f26a24ed0…

MALICIOUS

PDF

78.6 KB Created: 2021-03-26 03:49:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a35df3c97d4230ae6d607c89846dd002 SHA-1: b069ca5427d656deb3ee07923e512cf4da039de8 SHA-256: daf1e69f26a24ed07749c93e55faa876409864913ca4bc99ca377e3253a4bb49
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 0.9998

Heuristics 5

  • 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.
  • 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://mezovuduw.ru/123?utm_term=scientific+poster+template+illustrator PDF link annotation
    • https://wibidonegaka.weebly.com/uploads/1/3/4/5/134599285/witenajapevixeboluv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408335/normal_60503f9623638.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495039/normal_6009353c789ea.pdfIn PDF document text
    • https://cdn.sqhk.co/jofijoju/jeiSbid/word_sandwich_origin.pdfIn PDF document text
    • https://xewuligatojijow.weebly.com/uploads/1/3/5/3/135395235/loloxeroramexugawa.pdfIn PDF document text
    • https://gozarijaleb.weebly.com/uploads/1/3/4/3/134337750/detozera_vipetida.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368222/normal_5fc71182a2b85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459337/normal_6058da72f2c55.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379236/normal_5ffddf2a15710.pdfIn PDF document text
    • https://roboxojepuz.weebly.com/uploads/1/3/4/2/134235986/xoxawav.pdfIn PDF document text
    • https://gisogademumes.weebly.com/uploads/1/3/1/3/131379615/740770.pdfIn PDF document text
    • https://cdn.sqhk.co/tisufupujeli/JCIgchj/52470249317.pdfIn PDF document text
    • https://kupelaranix.weebly.com/uploads/1/3/4/7/134729830/1942724.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wumevagijez.epizy.com/91255900959.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/how_cold_is_the_coldest_place_on_earth_right_now.pdfIn PDF document text
    • https://s3.amazonaws.com/wutisigila/laptop_gamingowy_acer_nitro_7.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/sword_art_online_progressive_7.pdfIn PDF document text
    • http://sakigekoxigukil.epizy.com/delhi_metro_navigator_app_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/49876853.pdfIn PDF document text
    • https://s3.amazonaws.com/vajefam/whatsapp_for_pc_windows_8._1_pro.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC0 5264 bytes
SHA-256: 73e0b776a16b5851fd8e3a8a74a671fa2d9b3254d92c1dc1de3fdd0204bdc890
font_01_sfnt_off0000ff8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8D 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off0001081b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081B 10800 bytes
SHA-256: 2a011430915e214c704605fbe8a2d6bcec3aa274bc09a5104a9254ebf01065ba

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