Malicious PDF — malware analysis report

Static analysis result for SHA-256 bde6e7533521079c…

MALICIOUS

PDF

86.8 KB Created: 2021-03-05 02:13:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 4bc6ae118213b9df9e8c00c95a14cc51 SHA-1: 92d7856c383a716bec974a948ace629b370adb64 SHA-256: bde6e7533521079c3b6d60dab862e71b62bcca3eddb659e350bb90abee56176e
244 Risk Score

Malware Insights

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

The PDF contains a large number of links to external websites, many of which are hosted on disposable domains or known malicious redirectors. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though partially corrupted, suggests a lure related to biblical names.

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
  • 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.
  • 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/award?keyword=nombres+que+aparecen+en+la+biblia In PDF document text
    • http://rababevaju.22web.org/nawaxuzugotadova.pdfIn PDF document text
    • https://furiraduwonejos.weebly.com/uploads/1/3/4/8/134870793/3633516.pdfIn PDF document text
    • http://uggi-ugg.com/diwefakinizarawovokikoge3cyx0.pdfIn PDF document text
    • http://businesslinecenter.com/poberixemuxekogesixoruq3hb9.pdfIn PDF document text
    • http://scarcebook.com/futerea3gkq.pdfIn PDF document text
    • http://waniwukudalutef.22web.org/canada_visa_lottery_2018_online_application_form.pdfIn PDF document text
    • http://marketitaly.info/power_pressure_cooker_xl_chicken_and_rice_recipes3d0w1.pdfIn PDF document text
    • http://on-arenas.com/baldrige_excellence_framework_educationgh8dv.pdfIn PDF document text
    • http://tells.fun/the_roommate_agreement_free5oyho.pdfIn PDF document text
    • https://viradigoposexa.weebly.com/uploads/1/3/4/3/134383508/6e07881.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
    • http://tefinavi.epizy.com/85267364817.pdfIn PDF document text
    • http://mesujexu.rf.gd/ladifobovew.pdfIn PDF document text
    • https://8ed7b8cb-9bae-4def-ad9b-66b28cd11f91.filesusr.com/ugd/740d8c_f710983bb8244bc2a069ac80603022b7.pdf?index=trueIn PDF document text
    • https://ec679cc6-872a-45a8-b2fd-b1bc8f6ddb77.filesusr.com/ugd/d1d005_c96e508f2ecc497a9948975c9c4be7ff.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d6f8c9e-11ac-4984-8a59-8a35b1a7ccca/38206058749.pdfIn PDF document text
    • http://guvenaverelud.epizy.com/asme_boiler_feed_water_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98289748-cd59-4411-828a-c5a2d2145296/91760628820.pdfIn PDF document text
    • https://959e49da-b405-4961-97d4-5c1bb2e9a628.filesusr.com/ugd/ab0441_78d6f142e2d54ec3b0bde5698ec12a57.pdf?index=trueIn PDF document text
    • https://054d5c26-596f-48a3-87a7-0fc79031e5db.filesusr.com/ugd/599026_b14fd8379105406fa7b1a5ec87391a7f.pdf?index=trueIn PDF document text
    • https://eaae50f7-3b1c-4f1b-9b3c-e2a48377569d.filesusr.com/ugd/b96e41_ede31b7814764bc7800062922c9f9c84.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_off0000fb4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4F 5116 bytes
SHA-256: 820ef4283602546db1d528564e9e11e468280f35366b667b58b1049eab396218
font_01_sfnt_off00010c90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C90 16204 bytes
SHA-256: 6bb59a503a640ea97eb00ae6bdadc6c0c2995cb9baad67bc25705e440c656263
font_02_sfnt_off00013e3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E3E 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333