Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed30ab98ccea1820…

MALICIOUS

PDF

77.7 KB Created: 2021-03-10 06:31:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e71390f4a4f1830f2a5c2b566cc73437 SHA-1: 7f5406100f7ea075c8d3302f2b6f8882327a62fc SHA-256: ed30ab98ccea18207c3e082b31523ba3f8bbe2d72f6c38c1447452be1dd23176
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed to lead users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://maypoin.ru/award?keyword=ehtelam+ka+ilaj+in+urdu+pdf PDF link annotation
    • https://nanuleseja.weebly.com/uploads/1/3/4/0/134012971/bopero.pdfIn PDF document text
    • http://zoomita.fun/vesuwagemigowalagowivivuz49gcs.pdfIn PDF document text
    • http://yildirimotobursa.com/xunamevepeputavupobxsqcc.pdfIn PDF document text
    • http://btsworld.org/zobuzolixudibe17phh.pdfIn PDF document text
    • http://teachersaid.fun/dnd_5e_ranged_spell_attackjtpgc.pdfIn PDF document text
    • https://japilulijerimu.weebly.com/uploads/1/3/0/7/130738614/e00cb89ceb.pdfIn PDF document text
    • https://nesojikav.weebly.com/uploads/1/3/1/3/131398336/6184940.pdfIn PDF document text
    • https://levarimabogi.weebly.com/uploads/1/3/5/3/135328943/tuzeri-bilowijadowu-dabamuti-veludemegos.pdfIn PDF document text
    • https://lejonelawubuw.weebly.com/uploads/1/3/1/4/131453657/09f04353a0f.pdfIn PDF document text
    • http://khanapoorti.com/how_to_clean_rug_doctor_portable_spot_cleaneralj2c.pdfIn PDF document text
    • https://pemejelusapi.weebly.com/uploads/1/3/1/3/131398576/kugijawupovira.pdfIn PDF document text
    • http://ru-payment.casa/todupapazikezolj525r.pdfIn PDF document text
    • http://1xbets-reg.site/klein_organic_chemistry_solutions_manualy56dq.pdfIn PDF document text
    • http://luchdobro.site/allen_carr_book_free_download6dmjh.pdfIn PDF document text
    • https://kezobonuduwu.weebly.com/uploads/1/3/4/4/134457579/5822411.pdfIn PDF document text
    • https://kigijogi.weebly.com/uploads/1/3/4/7/134702755/8f0ea1ccd.pdfIn PDF document text
    • https://jobalexaxikut.weebly.com/uploads/1/3/4/8/134892204/dazesim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/buwawofotuwumowitoluk.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/posejijefapipem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a545ad8f-6401-4f5a-837b-6cdfd69c2ec7/what_types_of_sentence_structure_does_asl_use.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/wotaminakep.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/xifupulotivifozupukuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/230dbec8-7950-484e-b9f6-edc1db0df6d4/73175819302.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/tipos_de_comunicacin_escrita_en_las_empresas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e994771-b164-486f-9a75-290b6c55083c/nutidika.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_off0000e4c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C6 5200 bytes
SHA-256: b14fae301ca6641a1f4f09bbb40ce841eb735cd16994f9638b21db3d0f930b4b
font_01_sfnt_off0000f650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF650 15892 bytes
SHA-256: 5adb92d86c3681a5f8c5e5f28f1825e76b7035d354aae28209f8987b6e83a8ee