Malicious PDF — malware analysis report

Static analysis result for SHA-256 7866da2b4ae9842f…

MALICIOUS

PDF

82.8 KB Created: 2021-03-20 18:10:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 486c52faf186e26a5ba804736bec4615 SHA-1: d87d2ef1b8ab062ad3f2b3cfd05198aa8dc87c38 SHA-256: 7866da2b4ae9842fb0f27ca1d8d16d248fde1d6ff537830536ef4c04eca45ab8
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document exhibits characteristics of an advance-fee scam, using lures related to lotteries, prizes, and parcel delivery to deceive the user. It contains a significant number of external links, many of which point to PDF files, suggesting a link farm or redirection mechanism. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://zajinet.ru/wix?keyword=the+bible+experience+free+download
    • http://gagogepatajebe.medianewsonline.com/introduction_to_embedded_systems.pdf
    • https://wabezapodila.weebly.com/uploads/1/3/1/4/131437306/gafupogetivunat_foboto_pimuwuwa.pdf
    • https://pilinuxuxip.weebly.com/uploads/1/3/2/8/132814996/xowoga.pdf
    • https://dawoxojukuput.weebly.com/uploads/1/3/4/8/134890950/tabokadojararez-lunariser.pdf
    • http://fusekimutoxi.sportsontheweb.net/my_little_pony_the_sims_game_download.pdf
    • http://nogurufegu.mygamesonline.org/zuxanab.pdf
    • http://nexekeb.iblogger.org/33670966316.pdf
    • https://cdn.sqhk.co/sutazojawote/hjjdhcn/hello_neighbor_act_2_online_game.pdf
    • https://cdn.sqhk.co/zefafulolit/ZeghYok/soul_music_70s_love_songs.pdf
    • https://subegawi.weebly.com/uploads/1/3/5/3/135394411/golavufo_vadixufivawami.pdf
    • https://cdn.sqhk.co/remudejifi/fbZjdsy/brazilian_soccer_player_ronaldo.pdf
    • http://moxokivotalunuz.iblogger.org/7667840469.pdf
    • https://fakegegi.weebly.com/uploads/1/3/5/3/135312823/76252.pdf
    • http://puxuwowu.iblogger.org/10_generation_family_tree_template.pdf
    • https://cdn.sqhk.co/bexuxoxabim/DiiF4UP/elenco_do_filme_furia_de_titas_2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://bb55feb6-a0c4-48ae-8f72-aea2c45912f8.filesusr.com/ugd/b9801a_ae00a6beb97f4109930e3be03dd42078.pdf?index=true
    • https://1eb42bdc-3da6-4b32-b75f-4382f1721f8e.filesusr.com/ugd/35474d_802368d5d9fa4bc4868688e06d602a5c.pdf?index=true
    • http://mobukug.myartsonline.com/timuvixateguxobejizabojuw.pdf
    • http://dubirapotemudi.rf.gd/81994788235.pdf
    • https://cc0b58a5-7bf4-4b41-9cd7-d9bc0cd2cc6f.filesusr.com/ugd/6dc98b_2562f3551e58413793cb0edf45d448d8.pdf?index=true
    • http://jimomurapujivo.onlinewebshop.net/velunaromujubo.pdf
    • http://xofenilar.epizy.com/gilusudosafojokeka.pdf
    • https://1ceef7f3-d523-4f80-a0a4-3aed54d3d17a.filesusr.com/ugd/48841a_980ca16c3b974b75b5e6f18975676944.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5d6f659c-14db-4def-a138-d28a0f45da9f/how_to_use_a_mr._coffee_maker.pdf
    • https://uploads.strikinglycdn.com/files/f589121a-c7a3-4824-9cf2-e1bc11759605/7335188518.pdf
    • https://8a5a474a-a671-4857-921d-d1df0ee72544.filesusr.com/ugd/523716_326529436ec64195a6bd4132ea49b13e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/521c9279-a731-4c3c-8766-e1c4c856e902/how_to_take_off_glacier_bay_shower_handle.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa07.bin
b4fae75d8eb931a1bed5095b511ac9618d4f0ada37df83921a9c3e9c3894d909		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA07 5024 bytes
font_01_sfnt_off00010b14.bin
2bb3e0dd177a2d3bdb21d92b0cd70df625a436093390729edfc2fc57b2613bf8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B14 10608 bytes
font_02_sfnt_off00012f7f.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F7F 4324 bytes

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