Malicious PDF — malware analysis report

Static analysis result for SHA-256 38d27197e266dcf0…

MALICIOUS

PDF

74.6 KB Created: 2021-07-09 07:34:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3107f1207b31ed9dc109d63180c4c436 SHA-1: e45d9267ea85f926b9010d3064304515d0b1cb52 SHA-256: 38d27197e266dcf0f9801c7abfe4b68ec55f694b7f82ea2d1f5e4b397756fa78
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised websites and disposable domains, likely intended to trick users into downloading further malicious content. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://lamelove-zakryti.cz/userfiles/file/silesosusixojula.pdf
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/fcaec23c410f474c4ea0fabb657e49ad/90504669655.pdf
    • http://www.pzkexie.com/up_files/file/1501977882.pdf
    • http://canyonoaksmtg.com/~duckdi5/canyonoaksmtg.com/content/file/wukanetu.pdf
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/9af70be9ca14d9598dbcf416bb7223ae/nanapuwejenubalemize.pdf
    • http://akcjonariusz.com/UserFiles/file/89497442507.pdf
    • http://prvugkh.ru/uploads/files/22426730502.pdf
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/767722f782d0b9f332739f37f1163e41/33411916406.pdf
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c859f18eebd---56100591577.pdf
    • http://sharidyer.com/clients/863431/File/kewisixurapep.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1607eabb4a3a6d---41656715271.pdf
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/7f3bc24ccbb8bf08379b1c13c0bbdb89/48953942525.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160841f24eb087---95233356918.pdf
    • http://centromp.it/userfiles/files/41239143631.pdf
    • http://skolicka.eu/foto/images/file/20839818812.pdf
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/a8904c175fc38682b28300be225f685d/tizaviv.pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/53b456d0658a10c2be6573517d0ee7ec/97149446802.pdf
    • http://phsclassof1970.com/clients/875774/File/gisogobifesof.pdf
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/86b9fda75eefa6eda87377ad14a91c2d/pixomekukoxasufejuxixube.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160716aeb3da22---nolawipewunagu.pdf
    • https://hagakure.by/upload/editor/files/97563046377.pdf
    • http://bjaimama.com/data/upload/2021/06/file/202106282336384234.pdf
    • http://pensionpoint.cz/userfiles/files/gofegifajorifowuzazi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=rufus+booting+software
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c273.bin
933b052283087ae62a741c6b04a605f26b6fe451cd801f5517a2aa602db77614
pdf-font-stream PDF embedded font (sfnt) at offset 0xC273 16308 bytes
font_01_sfnt_off0000ec6e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6E 16792 bytes
font_02_sfnt_off00010485.bin
eb8d5403194a266d54b4367aa3677d7615873316c881bc78fcbf5aea9b07bfee
pdf-font-stream PDF embedded font (sfnt) at offset 0x10485 10716 bytes