Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a4348d664b2dbd4…

MALICIOUS

PDF

75.6 KB Created: 2021-03-28 15:53:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d82f83b76d57ceef0a459529b5de4195 SHA-1: d72d3ba6b9715ddca505030593819cf8456aac7e SHA-256: 1a4348d664b2dbd4c03f0a4e8947621ab62c4d2a7091c457edc9eda6e9cced9b
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, containing numerous external URLs, some of which are hosted on disposable domains. The primary URL, 'https://ponafet.ru/wix?keyword=spotify+beta+apk+latest+version', suggests a lure related to software downloads. While no scripts were explicitly extracted, the PDF structure and extensive external linking are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/wix?keyword=spotify+beta+apk+latest+version PDF link annotation
    • http://lezagerodise.iblogger.org/24971235922.pdfIn PDF document text
    • https://radigaligoled.weebly.com/uploads/1/3/4/3/134333621/3357746.pdfIn PDF document text
    • https://tezijiso.weebly.com/uploads/1/3/4/6/134690371/5766783.pdfIn PDF document text
    • https://tuxotise.weebly.com/uploads/1/3/1/3/131379496/nudenibolipa_sofes_wuduzakalusa.pdfIn PDF document text
    • http://joriwolujuf.sportsontheweb.net/koberitavotamiluvu.pdfIn PDF document text
    • https://jipuziloki.weebly.com/uploads/1/3/2/6/132695969/nufetu_powixetulafito_nomabozepi_jidaba.pdfIn PDF document text
    • http://tadajixilatu.scienceontheweb.net/business_development_head_job_description.pdfIn PDF document text
    • https://mixizuvas.weebly.com/uploads/1/3/5/3/135383824/8462147.pdfIn PDF document text
    • http://mufutekuson.getenjoyment.net/47780612782.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/41b45847-b5a5-456f-811e-54751bd84cf5/osha_10_construction_training_course.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca1b995d-c030-49e0-a90f-0249cd6ff565/what_is_imagery_in_sports_psychology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9ae54db-dbb0-469d-aea9-89b27b83a968/sizilawonerafizix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74e31d6f-1668-412a-a783-611befae026b/98437114058.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1441232a-7858-4365-9614-793b49bc317e/kowugowedisojofi.pdfIn PDF document text
    • http://kawozubugomolen.epizy.com/what_is_the_role_of_media_in_public_relations.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf7a57e6-439c-4a5e-a24f-9f065d1ae9b6/66820248965.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14b874bc-4b91-431b-82f6-a6d4a2addcb2/how_is_text_used_in_media.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44f4773c-149f-4ee2-a328-656a5d801120/koguk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64a0839b-7ee3-4a15-b432-7cf8c0547e39/who_buys_paperback_books_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/762f7e89-1efc-4e4f-9217-63e46baa087c/kin_word_origin.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_off0000e928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE928 5364 bytes
SHA-256: 1763fa67878f8b608d29b9a4e0a36fd69a85f7750c5ec6cebe3f6b3b5c68b259
font_01_sfnt_off0000fb85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB85 11024 bytes
SHA-256: 9ac5608aecf6ad791b1cf40e81df44c541a43d82d8ebe84657cc40a830d8aa4a