Malicious PDF — malware analysis report

Static analysis result for SHA-256 744718e277c70499…

MALICIOUS

PDF

78.6 KB Created: 2021-05-09 06:54:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a0f9a1ae8acba4922e44ae2147fbed0d SHA-1: a8d60156e69cc81dd2a6cf2efb24d5085fe7aac7 SHA-256: 744718e277c70499d4b70cb75c77f1ff5f4932f6841271840231abb9e78ea37a
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm and a phishing attempt. It contains numerous external links, many pointing to disposable domains, suggesting an attempt to redirect users to malicious content or phishing sites. The ML classifier and ClamAV detection further support its malicious nature, indicating it's likely a downloader or part of a phishing campaign.

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://dugedepap.ru/strik?utm_term=samsung+wb1100f+manual PDF link annotation
    • http://gaxenop.medianewsonline.com/velelisamuxuwomadekesama.pdfIn PDF document text
    • https://tatedugede.weebly.com/uploads/1/3/4/3/134311852/6618293.pdfIn PDF document text
    • http://nnorm-id.com/can_mother_of_the_bride_wear_a_short_dressyh4rr.pdfIn PDF document text
    • http://indonesia2health.online/do_magic_bullet_and_nutribullet_cups_interchangeablevt473.pdfIn PDF document text
    • https://katalulipof.weebly.com/uploads/1/3/2/7/132710678/wugitonomivi_dokonuwasapopu.pdfIn PDF document text
    • http://mafejaruvoje.sportsontheweb.net/6742385895.pdfIn PDF document text
    • http://cosmosqrab.online/990724197687xpr8.pdfIn PDF document text
    • https://waxebusesu.weebly.com/uploads/1/3/4/7/134770319/77b045fe682968a.pdfIn PDF document text
    • http://boxberry-24.cc/horizon_fitness_t101_treadmill_amazon0zqwt.pdfIn PDF document text
    • http://ruwosiju.getenjoyment.net/ibm_blockchain_for_dummies_download.pdfIn PDF document text
    • http://wovuwukotuvoxi.mygamesonline.org/25011472179.pdfIn PDF document text
    • http://tizadejaso.getenjoyment.net/vifikerogenil.pdfIn PDF document text
    • http://internet-babki.ru/dalegedexixuwaburez113od.pdfIn PDF document text
    • http://goldenframecollision.com/download_the_message_bible_free353b7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7f1158f2-e44e-4cac-991a-806210d1dc3e.filesusr.com/ugd/e4a8e1_8535e19b97634367a472b1d2eea114ae.pdf?index=trueIn PDF document text
    • https://91c7bc9f-df77-4dbd-ae51-8bcf521f3e61.filesusr.com/ugd/1df9ea_e5d8ecdf98494309a97d5d72d92a52d5.pdf?index=trueIn PDF document text
    • https://d89d6b52-6e76-4e18-bccb-bd7428cfddad.filesusr.com/ugd/02beb7_26c2f5914c214c6eb13457ab7c865f24.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dadupawo/anaconda_cinema_telugu_movie.pdfIn PDF document text
    • https://b54663a3-ff9d-4122-b75c-69b71428c9b0.filesusr.com/ugd/cfa91a_9e90001e3cbc41d3aabc4c60f3307d13.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/tomtom_n14644_europe_maps_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/what_color_is_an_evaporation_line_on_a_pregnancy_test.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_off0000f3ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EE 5520 bytes
SHA-256: 4bf6494aaf9db667e2bf11ac1f007375a1c30288082092d580a2fcfb6d969f6d
font_01_sfnt_off000106bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106BC 11524 bytes
SHA-256: 7ed8ac8796df257eadae3842bd507d5f62b120a78d720e5e06a17c772cb05abc