Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd82d2180cad31e2…

MALICIOUS

PDF

93.0 KB Created: 2021-04-12 00:59:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8226eb143f016c15cac40b92b645382d SHA-1: 68b27c9b728cfd7eb16fb0a7a848e1f3c91306d5 SHA-256: fd82d2180cad31e2b42dfa145b201814243ef464f14a58556bd8249b683be004
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The document body, though heavily obfuscated, contains a lure related to fixing washing machine error codes, which is likely a pretext to drive traffic to malicious or phishing sites. The presence of PDF-specific heuristics like 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM', along with a high ML classifier score and ClamAV detection, strongly indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://botokaw.ru/strik?utm_term=how+to+fix+le+error+code+on+lg+washing+machine PDF link annotation
    • https://fusorebumobem.weebly.com/uploads/1/3/3/9/133986296/gevoponixaxi.pdfIn PDF document text
    • http://stroy-level.ru/karcher_pressure_washer_repair_shopnc6x1.pdfIn PDF document text
    • https://boviseweduxiraz.weebly.com/uploads/1/3/0/7/130776594/gexanixumonezor.pdfIn PDF document text
    • http://naturka.space/nazonedijazarosovogiwasurfcf6d.pdfIn PDF document text
    • https://lopazilavorelid.weebly.com/uploads/1/3/4/0/134097689/bizuzerizel.pdfIn PDF document text
    • https://cdn.sqhk.co/menigopas/8xgefie/81573212872.pdfIn PDF document text
    • https://cdn.sqhk.co/jipuxoxukul/iggiaeA/29472719013.pdfIn PDF document text
    • https://fereganew.weebly.com/uploads/1/3/4/1/134131887/kowexag-xedesenuvo.pdfIn PDF document text
    • https://nevofegef.weebly.com/uploads/1/3/4/8/134851200/moxiw.pdfIn PDF document text
    • https://cdn.sqhk.co/mekaxosur/jiiiyhe/40040097465.pdfIn PDF document text
    • http://lnstagram-helping-centre.com/why_wont_my_oven_open_after_self_cleaning4pk9d.pdfIn PDF document text
    • http://dezunanerab.iblogger.org/dji_naza_lite_upgrade.pdfIn PDF document text
    • https://cdn.sqhk.co/zoturisa/klrajfm/vodafone_yan_mda_apk_indir_eski_surum.pdfIn PDF document text
    • https://cdn.sqhk.co/salobosemiv/Igg0hbI/spb_melody_hits_songs_offline_tamil.pdfIn PDF document text
    • https://nuxogisufebodad.weebly.com/uploads/1/3/5/9/135965827/c15b4d9.pdfIn PDF document text
    • https://fezimadi.weebly.com/uploads/1/3/4/4/134487715/sisexegozuve-tedasipivobase.pdfIn PDF document text
    • http://nanolenka.xyz/what_are_the_different_types_of_civil_warrs2i9.pdfIn PDF document text
    • https://dumopodowejuna.weebly.com/uploads/1/3/4/5/134591879/gigefisotatodili.pdfIn PDF document text
    • http://expressday.online/five_nights_at_freddys_3_apkpurei8osm.pdfIn PDF document text
    • https://sumiloruxefeme.weebly.com/uploads/1/3/2/8/132814276/1fa61.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gejagixuz.epizy.com/apowersoft_video_er_for_mac.pdfIn PDF document text
    • http://gizadopozi.epizy.com/how_to_make_technical_specification_document.pdfIn PDF document text
    • http://jabowedufup.epizy.com/aplikasi_nonton_film_indonesia_gratis.pdfIn PDF document text
    • http://wofenexofube.rf.gd/95479307794.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/firefox_bookmarks_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/kubedukowug/58808069027.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF811 5556 bytes
SHA-256: 0c49f78c60046444cd53b8dc14a3e4e2010eb50b852aa98b0753c3758b6b4366
font_01_sfnt_off00010ae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE4 17620 bytes
SHA-256: 7d0983a487c948bf8346b4e941efac8f26e924adc86a9739ba2e0ff4eb2271f2
font_02_sfnt_off00013d8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D8F 11772 bytes
SHA-256: bf4797efd2a38df635624e71f2440e7a643ee9597fdd233d3c0fd24a7be5f005

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