Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cabdc0dea9a0b05…

MALICIOUS

PDF

75.4 KB Created: 2021-05-13 00:22:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: adfc94968462afecb488a33a6b733585 SHA-1: 942e4adb3aaaaa49e604850a829a3db549e7b311 SHA-256: 7cabdc0dea9a0b050c728b3c67c5389e1027b2aef2d10b645e25202979d5e41f
186 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 0.9997

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://bologen.ru/strik?utm_term=should+i+be+worried+about+a+precancerous+mole PDF link annotation
    • https://garanokuwepo.weebly.com/uploads/1/3/0/8/130874617/440092e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415770/normal_6035c438dd28e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426425/normal_603d357e2586b.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/eich3ib/90496032596.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369486/normal_6068e2ba54485.pdfIn PDF document text
    • https://vibitidit.weebly.com/uploads/1/3/4/7/134712982/zesajekibeda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380859/normal_603bc84375406.pdfIn PDF document text
    • https://cdn.sqhk.co/senaveduwiz/e3vqihk/agrarian_reform_problems_in_the_philippines.pdfIn PDF document text
    • https://cdn.sqhk.co/rawerusiwala/eigjbF7/tales_of_azarus.pdfIn PDF document text
    • https://vamotavobepud.weebly.com/uploads/1/3/1/4/131438348/zagojoda.pdfIn PDF document text
    • https://cdn.sqhk.co/zavilisuga/dggX8gd/lego_super_mario_71360_building_instructions.pdfIn PDF document text
    • https://wovupidej.weebly.com/uploads/1/3/4/6/134687137/bedigukus-gelux.pdfIn PDF document text
    • http://vizemezezu.sportsontheweb.net/certificado_de_origen_mexico_japon.pdfIn PDF document text
    • http://giwosoto.sportsontheweb.net/what_are_the_benefits_of_360-degree_feedback.pdfIn PDF document text
    • https://cdn.sqhk.co/jinuzekovodi/RcjaiRi/grass_cutter_repair_shop_near_me.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c16142fa-377b-41ab-ae2e-c0a567286f93/passing_larsen_quotes.pdfIn PDF document text
    • http://lolunoxij.myartsonline.com/mujavarilugimorixugefes.pdfIn PDF document text
    • http://semowomeso.onlinewebshop.net/adobe_illustrator_convert_to_vector.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/stephen_hawking_younger_days.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/89592723639.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a1545b9-fd40-40fb-9ee8-3b591dfaaf51/lisananotepasi.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e91f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91F 5648 bytes
SHA-256: ec00261df7fed88a3ce50da1b0608c1776d99b3c13e54ea8ead848ad4f8fdc9c
font_01_sfnt_off0000fc38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC38 10512 bytes
SHA-256: 37566ec35517d1ee3c056fbf7a5c3f7a3d55a56f0e5a2c00b0dc26fb616d2dc5

Open this report in the interactive analyzer, or submit your own file for analysis.