Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5d6ead17c7921a1…

MALICIOUS

PDF

90.6 KB Created: 2021-06-27 15:49:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: be1a3366dcff6bddc7729d5c75ac2486 SHA-1: e6582adbe5e93b89038cd670f7182b54b5a90676 SHA-256: f5d6ead17c7921a165487f6fffe01db18974cf9cd2971b51364c7653dac9476a
176 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous links to external resources, many of which point to compromised WordPress upload directories or disposable hosting. These links likely serve to redirect the user to download further malicious content, such as malware or phishing pages. The presence of multiple compromised CMS upload links and link farms suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://cateringkieuan.com/uploads/userfiles/file/makasexuwexo.pdf
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e459ca3ff0---xoratumilok.pdf
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2c1503bae---87652317253.pdf
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/531f696670bee3b2bc2ded75d6121bc2/fuzopomovivi.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f5de54f4c2---posoguxuwaratama.pdf
    • http://t-p-fortune.com/userfiles/file/91445268203.pdf
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/842afe6619d4a4caff433e3460e67fd6/65160933083.pdf
    • https://datawire.gr/files/files/3590465809.pdf
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088a27e45f2a---70088538897.pdf
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160872ea4ea045---4863127229.pdf
    • http://abwingssuffolk2.com/uploads/files/sawubudoremawefe.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/tdfn0qmrepd36lqp68prtlgfd2/badonuvojiwu.pdf
    • http://toyotarent.kr/FileData/ckfinder/files/20210618_103FFEA9AC2CD920.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/6f8575fbb976cd8affe1bd3ac153c7e2/92031147572.pdf
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/rbg7nucine695ds8g1ds6c5q54/xivodasipisawovik.pdf
    • http://zrdb-drogbud.pl/Upload/file/23338783196.pdf
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16088a7283503d---15791168860.pdf
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c6a0013f673---lapobunetepenumaxemeb.pdf
    • https://sasalidayanisma.org/uploads/file/25720129782.pdf
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/8a68c02960dab8da3a771f0b5f95d59e/47422275509.pdf
    • http://157.230.241.115/image/upload/File/tijabegiparozef.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609db1d0d3c79---pesar.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=project+manager+scenario+based+interview+questions+and+answers
    • 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_off0000fead.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAD 16792 bytes
font_01_sfnt_off000116c4.bin
83522d95c0cda7314c4416ab2732ca466be4418585ccc2ba635208fe1c61220b
pdf-font-stream PDF embedded font (sfnt) at offset 0x116C4 11336 bytes
font_02_sfnt_off000130f2.bin
e9b61b12f8350d112df3ce209e73f70d776711b822f6479fb43eea42507bbbf6
pdf-font-stream PDF embedded font (sfnt) at offset 0x130F2 16928 bytes