Malicious PDF — malware analysis report

Static analysis result for SHA-256 d14fa11269a8c00d…

MALICIOUS

PDF

75.9 KB Created: 2021-03-28 00:13:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: eca9551d5f3d373f8c3d632fc2b1daf2 SHA-1: b109d6db243ecdc29ad615b775985e30555c2d7f SHA-256: d14fa11269a8c00d6e9e56ff659353c061d3b58ede54e8540f25a385fafa758a
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs, such as 'https://xezojetit.ru/strik?utm_term=dish+network+specials+for+existing+customers', are likely used to redirect users to malicious sites.

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://xezojetit.ru/strik?utm_term=dish+network+specials+for+existing+customers PDF link annotation
    • https://wimavebitajiki.weebly.com/uploads/1/3/4/6/134609796/1248443.pdfIn PDF document text
    • https://wisomekusarukit.weebly.com/uploads/1/3/5/3/135384288/xisaram.pdfIn PDF document text
    • http://zoguponuwuxoli.medianewsonline.com/7557919158.pdfIn PDF document text
    • https://gariligiradafa.weebly.com/uploads/1/3/4/0/134041078/biziwokalimemix.pdfIn PDF document text
    • http://dorutote.scienceontheweb.net/drawing_birds_with_colored_pencils.pdfIn PDF document text
    • https://cdn.sqhk.co/winogolelog/uNjahgb/harkins_theatres_flagstaff.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwadezab/JzA2jgC/kiku_menu_paramus.pdfIn PDF document text
    • https://zidinekolinom.weebly.com/uploads/1/3/4/5/134516346/3191771.pdfIn PDF document text
    • https://sowofofum.weebly.com/uploads/1/3/2/8/132814146/8557826.pdfIn PDF document text
    • http://ropisunofo.mygamesonline.org/40k_9th_edition_full_rulebook.pdfIn PDF document text
    • http://xupulakikovuxo.mypressonline.com/97818360728.pdfIn PDF document text
    • https://cdn.sqhk.co/kitaparek/iciciiW/piwebojazolub.pdfIn PDF document text
    • https://kibugaduxabe.weebly.com/uploads/1/3/4/5/134510017/bafanupogeseto.pdfIn PDF document text
    • https://fujerituzaxu.weebly.com/uploads/1/3/0/7/130775231/koxuniviwibojege.pdfIn PDF document text
    • https://cdn.sqhk.co/miwavilusaji/heifPib/ball_brick_breaker_original_game.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvonusebex/9gd1id8/nail_designs_coffin_fall.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dirazonun.myartsonline.com/31409351651.pdfIn PDF document text
    • http://perexuwofogefo.onlinewebshop.net/centrifugation_principle_types_and_application.pdfIn PDF document text
    • https://3857ddc0-2b33-46ba-b4a8-ebef9b167687.filesusr.com/ugd/5cc0d5_6ea3a3359b064232a40e91103e7a4ccf.pdf?index=trueIn PDF document text
    • https://502e425a-54a0-4661-a3e6-c6e116bdb13d.filesusr.com/ugd/10da26_729001c3384e41fdafa2ce3a98c99ea0.pdf?index=trueIn PDF document text
    • https://1eba3b37-3dce-45e8-aa15-e51a58efc0fe.filesusr.com/ugd/89e37c_5c6715d1e6994c998fb6084b911e8ad5.pdf?index=trueIn 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_off0000e82f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE82F 5652 bytes
SHA-256: 4fe6accc3a163f8059f8c998f677e3aa99d792c27012f8cb8f5424dedf6e4502
font_01_sfnt_off0000fb65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB65 11308 bytes
SHA-256: 4c215e00bd5c547093c05e67ab616f6c8ac821777908b830a8d097bc97a99763