Malicious PDF — malware analysis report

Static analysis result for SHA-256 032892d9214eef48…

MALICIOUS

PDF

77.6 KB Created: 2021-06-29 15:32:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5a8bd1466a34583e3bb92815b2ab3ae0 SHA-1: f8598799f14b0e34657ef714d31af89a708325d1 SHA-256: 032892d9214eef48d05aa4e7a6e3bcbd22ce12df55d948aff18d9886f4af46ac
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous URLs, many hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body is unreadable, but the heuristic firings and numerous extracted URLs suggest the primary purpose is to redirect the user to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

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 https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/7e9eb38ea71d75651be4ca12ddfca49f/zesaninisexesovivakilis.pdf
    • https://nanyangtextile.com/userfiles/file/10276605824.pdf
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/b674f2b4726af7ee7b626747e021b320/88522412417.pdf
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/5ncmaurle68opip503b2ojpjtn/didapadaloninematilo.pdf
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160836b5c7e008---5623909025.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160818cdc16dbf---6896358576.pdf
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607d65de6f61a---sabifuvirinevo.pdf
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608a3289ef5c3---rikamej.pdf
    • http://splogservice.ru/content/file/rikonij.pdf
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/8f19309b73d5689b2002426cbd2c872b/48594478083.pdf
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160941456983e3---daxuluwedodajisojamitago.pdf
    • https://premium-house.uz/images/file/92503163771.pdf
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/4bcc733187d48cd0ea1dca5df9839dc2/vogakom.pdf
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/oddfqkoia3g8d2mak9oe0geasq/95197190654.pdf
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/a56f917bc03cfc07b34268c96e59b497/95034647238.pdf
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/f3a83dacc53a212c4e5899f2c4d6291a/kimalago.pdf
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/0e6472rqigvedl3008li02oral/sudozalafuvixizogozax.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160c68770f0236---61334776282.pdf
    • https://tenfci.org/userfiles/file/golununimubelokupo.pdf
    • http://kagoshimakojintaxi.com/userfiles/file/sirinodizanip.pdf
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/fa453da458465703c887e06b1171eb39/nozojativisijulinamugogu.pdf
    • http://qca.ch/userfiles/file/25201792870.pdf
    • http://labsshop.com/d/files/32391933303.pdf
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f809a21224---93887882623.pdf
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/7b20b852a66f7b4d31c76e82ac8fda8e/66608663905.pdf
    • http://broadmoor79.com/clients/864886/File/12881859385.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b9034b1fc---78240870237.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=a+non+metal+that+conducts+electricity
    • 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_off0000cf1f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF1F 16792 bytes
font_01_sfnt_off0000e731.bin
1b741cc6dfb2bb771908095ae3a3876095d024a637377ea3f3366fa919d0c693
pdf-font-stream PDF embedded font (sfnt) at offset 0xE731 15868 bytes
font_02_sfnt_off00010fec.bin
813a89bc3b908335386a109b4b667785a5b5043e9f120c13f6eecfca812a547d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10FEC 10832 bytes