Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e2e6aa3c8436be3…

MALICIOUS

PDF

68.3 KB Created: 2021-03-11 17:07:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 5bf69321b489215715ac2f255438abc6 SHA-1: 6faf9ff7648d7687c75cb2260d2d9296a9a598c8 SHA-256: 4e2e6aa3c8436be38a8de6e5faf9c6eed1355b7e023e6ca8bbaf378457d6e836
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a PDF document, likely intended to trick users into visiting the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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 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/123?utm_term=aleluia+a+minha+alma+abrirei+pdf In PDF document text
    • http://lotto-investclub.com/schwinn_213_recumbent_exercise_bike_for_sale9k9qp.pdfIn PDF document text
    • https://bovikobugekut.weebly.com/uploads/1/3/0/7/130775803/wupij.pdfIn PDF document text
    • http://fruits-summer.fun/wazejedinavus99xc6.pdfIn PDF document text
    • http://cabinetshub.xyz/how_to_position_yeti_micp9uhi.pdfIn PDF document text
    • http://alex-chekalev.com/52536244200lhwvv.pdfIn PDF document text
    • http://kedugobepuged.mywebcommunity.org/26550132085.pdfIn PDF document text
    • http://nikibolerobika.getenjoyment.net/pefexupikimisusizigoje.pdfIn PDF document text
    • http://wojurimaxab.mywebcommunity.org/94953072943.pdfIn PDF document text
    • https://zedijonen.weebly.com/uploads/1/3/4/0/134018258/e6acc02d49.pdfIn PDF document text
    • http://dilawiputonu.mypressonline.com/80313801956.pdfIn PDF document text
    • http://seedcraft.online/33366345847f0oxf.pdfIn PDF document text
    • http://gajozemexip.22web.org/niv_bible_free_apk.pdfIn PDF document text
    • http://tiruxukanemaga.iblogger.org/new_call_of_duty_2019_android.pdfIn PDF document text
    • http://rumigiwataj.getenjoyment.net/kamunilivabati.pdfIn PDF document text
    • http://lurubalopare.sportsontheweb.net/what_does_the_woodcock_johnson_iv_measure.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kuwexugebukutim.rf.gd/data_clustering_algorithms_and_applications_aggarwal.pdfIn PDF document text
    • http://vujapoguxesak.myartsonline.com/how_to_make_a_crown_royal_chair.pdfIn PDF document text
    • http://vipujaxetixise.epizy.com/ruwadoxezupote.pdfIn PDF document text
    • http://wozawexopad.epizy.com/bedutez.pdfIn PDF document text
    • http://bikemeno.rf.gd/liwidibimux.pdfIn PDF document text
    • http://tipixerokofor.epizy.com/6729413181.pdfIn PDF document text
    • http://betakudo.atwebpages.com/xukoliw.pdfIn PDF document text
    • http://desejiboferade.rf.gd/how_to_keep_the_attention_of_a_child_with_adhd.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_off0000cce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCE9 5232 bytes
SHA-256: c1a5fb1c1124a38753a99c90d9e20a05fa88f3f7a7f6caff2430dfff0bcc5c9c
font_01_sfnt_off0000de85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE85 11172 bytes
SHA-256: e100bb0ba096a25f07ffe5458617becf9cc232325106661a48b11019f1b9d7a9

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