Malicious PDF — malware analysis report

Static analysis result for SHA-256 77ee2aa43712fec4…

MALICIOUS

PDF

84.8 KB Created: 2021-03-23 17:26:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ed16f7911b2227efd656326d8223baf SHA-1: e935b7383718a84980070e0351a0afbecc2ecfdf SHA-256: 77ee2aa43712fec47182f8770fd47d9502e7c20723cf442711483d1a27f476cd
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many with numeric or generic slugs, indicative of a link farm or SEO spam tactic. The presence of a critical heuristic firing for 'PDF_SEO_LINK_FARM' and ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent. The document body, though heavily obfuscated, contains keywords related to 'madden mobile hack android apk 2019', aligning with a lure for potentially malicious downloads or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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
  • 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://kuzutuzo.ru/wix?keyword=madden+mobile+hack+android+apk+2019
    • https://cdn.sqhk.co/xoxamomajil/f45kv6R/zitelogadipefemefif.pdf
    • https://cdn.sqhk.co/xovenekot/gjjfgjT/oregon_car_bill_of_sale_form.pdf
    • https://cdn.sqhk.co/kinanekoxo/8hfgiou/17572757825.pdf
    • https://cdn.sqhk.co/fexivijemozu/Ui6jdha/19933694856.pdf
    • https://cdn.sqhk.co/losokifape/jigdcin/sure_shot_lyrics_yellowcard.pdf
    • https://cdn.sqhk.co/kepilujofeje/jgtgdic/tamil_love_whatsapp_status_video_download_mp4.pdf
    • https://cdn.sqhk.co/sowanigog/hWgcjel/rome_total_war_cheats_for_iphone.pdf
    • https://cdn-cms.f-static.net/uploads/4369174/normal_602cfe6d4c799.pdf
    • https://cdn.sqhk.co/dubibuwa/eijgjRC/nike_outlet_store_vacaville.pdf
    • https://static.s123-cdn-static.com/uploads/4384459/normal_5fc6d7c38c26f.pdf
    • https://cdn.sqhk.co/delojiwuguj/icvLPZP/hearthstone_top_decks_2020_march.pdf
    • https://static.s123-cdn-static.com/uploads/4456114/normal_5fc7b8556583f.pdf
    • https://cdn-cms.f-static.net/uploads/4379731/normal_601f3ad1dc54d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://d12e84a0-9808-45da-82c6-613dfe540d1b.filesusr.com/ugd/dc8a8e_304c022e1c74476f9a74f11f837d0581.pdf?index=true
    • https://26c1613e-5d28-4fa3-89cb-3d2c9ab59faf.filesusr.com/ugd/fe83c3_24b81443857e49e0bba28ff409fa2079.pdf?index=true
    • https://s3.amazonaws.com/supefujoxopubu/nuzijadupirafozataro.pdf
    • https://65de77fc-0341-4fd2-89b2-cd6b005a91de.filesusr.com/ugd/cf79db_694da9ebddc74bc1a7ccfdf895056f3e.pdf?index=true
    • https://5e0c4d4d-41f9-428c-9564-b93e7cff6769.filesusr.com/ugd/510691_aa226e68458647efadd1ecf5402a27e9.pdf?index=true
    • https://s3.amazonaws.com/limewub/coca_cola_annual_financial_report_2018.pdf
    • https://0298dc5a-7924-4276-8279-06452a5288da.filesusr.com/ugd/b30cf0_8cf9feef5adc4af09aa33bfd4b084ada.pdf?index=true
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1f9.bin
00c0a141202c10936ceac8b8df9df75720096dbedde9c5fde8d9f3447cbb363c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F9 2960 bytes
font_01_sfnt_off0000fc68.bin
ad95f83f19fe9794dc042a2ba445b1e12826cd25ff1d90060846952572ac6cec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC68 5532 bytes
font_02_sfnt_off00010ef4.bin
e56c209f7279e4acc173b25c611797e94cdb5a4cfd65c6fc1081061fcd59ad5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF4 11236 bytes
font_03_sfnt_off000135a4.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x135A4 4324 bytes

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