Malicious PDF — malware analysis report

Static analysis result for SHA-256 50fc962b49fa4e16…

MALICIOUS

PDF

80.3 KB Created: 2021-04-03 12:57:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 05e6837970fb73e267a46761c7e47c61 SHA-1: b5de024100b2281ae1fbb1afd4ac0d109cb54f55 SHA-256: 50fc962b49fa4e16179a6d2c1eb1c8257cd46920fce4eab12f3096fdf18d0c76
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • 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://xezojetit.ru/123?utm_term=circuit+simulator++for+pc PDF link annotation
    • https://zorisurirumu.weebly.com/uploads/1/3/4/6/134600588/e8a84e60.pdfIn PDF document text
    • https://kalozepi.weebly.com/uploads/1/3/0/8/130814360/8548321.pdfIn PDF document text
    • http://buvavarosavadar.iblogger.org/iodine_and_cornstarch_diffusion_lab_answers.pdfIn PDF document text
    • https://rawonosegapit.weebly.com/uploads/1/3/5/3/135314608/ad5899259ce6.pdfIn PDF document text
    • http://xenuven.22web.org/joomla_quickstart_template_free.pdfIn PDF document text
    • https://mugifafuvutasij.weebly.com/uploads/1/3/4/1/134108805/2269606.pdfIn PDF document text
    • http://jiwimejikigigu.mywebcommunity.org/nickel_affinity_chromatography.pdfIn PDF document text
    • http://kubosikavudux.mygamesonline.org/academic_journal_guide.pdfIn PDF document text
    • http://sebekeruxa.iblogger.org/segonajizerofopejutisaw.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/kofabube/how_to_tune_a_cobra_29_nw_ltd_classic_cb_radio.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/delasedupiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8c13814-5730-41d6-808b-1192e128ad8e/gokavefodalowiwaroponu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e81e35c5-1053-4f57-a8da-8e463b49e192/watch_salems_lot_1979_free_online.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/49974610044.pdfIn PDF document text
    • http://rojepubaxogo.epizy.com/70895066176.pdfIn PDF document text
    • https://s3.amazonaws.com/zagubip/aggiornamento_java_android.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/bihar_map_free.pdfIn PDF document text
    • http://xawixojupaxixan.onlinewebshop.net/zekexemizolamagug.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/zukugisugiliwut.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/gozinaxijoxiwekag.pdfIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/kukofegenojefoxu.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/galactic_civilizations_iii_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b051063-4f61-435c-bf18-7c69fd373832/68089133792.pdfIn PDF document text
    • http://lavoxema.onlinewebshop.net/sutenaletaj.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_off0000fcfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFB 5064 bytes
SHA-256: af803aac78cd87c2759e50fabd463565d02bdd930fbdef7513e6054931ed235c
font_01_sfnt_off00010e1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E1E 10972 bytes
SHA-256: e3caa97d2f0db3212acc139c3deff3dee076f39dc82e1cbe36e95705a399788a

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