Malicious PDF — malware analysis report

Static analysis result for SHA-256 40e74a04cb1d2bbb…

MALICIOUS

PDF

75.9 KB Created: 2021-06-08 04:06:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 5814e95ee3dedcf124a1397f87571353 SHA-1: 0a606ac034918a3d096bcda780275db79f52d767 SHA-256: 40e74a04cb1d2bbb0c74d8780b9bef8fdd47b860f67af2733c81ced4af890edb
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous external links, many of which are hosted on disposable domains and appear to be part of a link farm designed to attract users searching for specific content, such as 'download marvel strike force mod apk'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://irlanc.ru/pbw?utm_term=download+marvel+strike+force+mod+apk+unlimited+everything PDF link annotation
    • https://nizomepovunamox.weebly.com/uploads/1/3/4/3/134305669/f404cbdec6.pdfIn PDF document text
    • https://sumigixutaruxaj.weebly.com/uploads/1/3/4/7/134748626/96c643aed.pdfIn PDF document text
    • https://tisizapotiw.weebly.com/uploads/1/3/0/7/130776245/fovabuverowe.pdfIn PDF document text
    • https://polabobaxadujo.weebly.com/uploads/1/3/4/7/134775235/e53e285120.pdfIn PDF document text
    • https://sadusanolomu.weebly.com/uploads/1/3/4/6/134646393/wisalute-wadutagisa-fuvevubabis-desegafuru.pdfIn PDF document text
    • https://sixamipad.weebly.com/uploads/1/3/4/7/134726782/874e7feaf9b1c.pdfIn PDF document text
    • https://panulozeti.weebly.com/uploads/1/3/5/3/135351273/91ba766e.pdfIn PDF document text
    • https://denonifo.weebly.com/uploads/1/3/4/7/134709080/9239171.pdfIn PDF document text
    • https://zuripuwa.weebly.com/uploads/1/3/2/7/132740693/5605267.pdfIn PDF document text
    • https://todatotosikuped.weebly.com/uploads/1/3/0/7/130740429/jadimetabusamo.pdfIn PDF document text
    • https://kakulekatorud.weebly.com/uploads/1/3/4/6/134681497/kororulig.pdfIn PDF document text
    • https://burodinijosago.weebly.com/uploads/1/3/0/8/130813714/ec1ef533633.pdfIn PDF document text
    • https://kapadarobuziwel.weebly.com/uploads/1/3/2/6/132696145/samomusutumuga.pdfIn PDF document text
    • https://jutifakakunule.weebly.com/uploads/1/3/5/9/135985430/13f400c684e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fepewuwakow.pbworks.com/w/file/fetch/144596823/unison_square_garden_sugar_song_to_bitter_step_mp3_download.pdfIn PDF document text
    • http://rasovuxosew.pbworks.com/w/file/fetch/144563880/vivafenupupanibikafozato.pdfIn PDF document text
    • http://lezakoliz.pbworks.com/f/new_motor_vehicle_act_2019_in_hindi.pdfIn PDF document text
    • http://tukosifana.pbworks.com/w/file/fetch/144826782/bivogelaf.pdfIn PDF document text
    • http://jifosez.pbworks.com/f/86286813480.pdfIn PDF document text
    • http://puzavofan.pbworks.com/f/how_to_write_a_compare_and_contrast_paper_outline.pdfIn PDF document text
    • http://jobagej.pbworks.com/w/file/fetch/144828999/termorregulaci3n_en_perros_gratis.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_off0000e965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE965 5884 bytes
SHA-256: 171bf6374f5f9e5c8d0916f4c1bae7502761819c8762123a783dfc92da751149
font_01_sfnt_off0000fd6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6E 10684 bytes
SHA-256: f52f289cc6229bb3214375a80e33319fea568dee29d813bfb6e2865ba69a8fd8