Malicious PDF — malware analysis report

Static analysis result for SHA-256 cecda643894ca657…

MALICIOUS

PDF

85.9 KB Created: 2021-07-05 23:57:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 08be48c33f17ae7530c73fd435354ca3 SHA-1: c857f3331bb2f18c3c320324a00e6be9b4c071a1 SHA-256: cecda643894ca657061929ca444d8985679c69bf8db93c1be71c52f5940af804
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious. It functions as a link farm, containing numerous URLs pointing to compromised CMS upload directories and disposable hosting. These links likely lead to phishing pages or further malware downloads, indicating a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://sluchatka-shop.cz/files/upload/files/mitukezuxa.pdf
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/af984c77b59bc5460064cf3355e00bb5/butobavi.pdf
    • http://birnagarcollege.in/userfiles/file/78612855571.pdf
    • https://pasarantogeldua.com/contents//files/14623189036.pdf
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0596a9b48b---burabom.pdf
    • http://www.allatpatikapecs.hu/images/file/51034615355.pdf
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160917163dac12---xomowopaxaze.pdf
    • http://www.annaleehuber.com/content_files/file/mupazitisepexokus.pdf
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/cfviee80jlfouvb8pfeek93cv2/buwinadij.pdf
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/lpjdb0483o5mtmd5uq2n0fvsdo/65334695199.pdf
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/811e39b11e9d2417c3925e7a1887ed00/70018884810.pdf
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/4963f9d4a5dfd6fa147384a58de47672/fovubitufifubolep.pdf
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a76ac8426---90388657225.pdf
    • https://bompentax.com/quangbasanpham/app/webroot/upload/image/files/niluwolafixid.pdf
    • http://bannermaul.com/userData/board/file/39940238007.pdf
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e97e5ddfa6---lagof.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160d8502283617---39298019874.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d85d85dfda2---fuwudivupeka.pdf
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/nf5u3nubrfv0nmgaq8uaknv1es/buzixa.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160712f0a0b87c---18826076451.pdf
    • https://hophamthaibinh.com/upload/files/dapekizudusojo.pdf
    • http://walkofagesvt.org/clients/0/0e/0e42319052772b195a43ba3ede0f03e0/File/96909748489.pdf
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/cca991b6e115ec8a62ad470c0123ca74/webomofovunebekaxowanij.pdf
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/a0eee2lsm5rhpi2oilta4v3791/11889140270.pdf
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/v0dc0tv2rhso5088gc44mq29p0/12858149170.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=holy+ghost+fire+fire+fall+on+me+lyrics
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4c6.bin
45df0dc2512cb51df6c677eff3e72fe9d98d7d3414f94102c23b45367569d5a6
pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C6 16892 bytes
font_01_sfnt_off0001010d.bin
27fa49ca30b1f57c6e4f8b99ad1f73ead7010ce1f191e20d716503af09158f46
pdf-font-stream PDF embedded font (sfnt) at offset 0x1010D 16160 bytes
font_02_sfnt_off00011686.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11686 16792 bytes
font_03_sfnt_off00012e9d.bin
a2c506e9e47aa53da3d106f605a0ea2169e3ad1cbe41f64ca88a3cb77830a7a0
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E9D 10888 bytes