Malicious PDF — malware analysis report

Static analysis result for SHA-256 12e7a60d712dc711…

MALICIOUS

PDF

239.3 KB Created: 2021-07-03 04:05:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 39c8787304f27b922c645c3fb5cf8576 SHA-1: 15e1267a25d8b84b19d557a425c31762cd02921d SHA-256: 12e7a60d712dc7112dab3ef05c7414dfa8c5d365ad3908ae4aa72c22afebe6e9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, indicating it is a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites, which likely serve as lures for users to download further malicious content. The PDF structure itself does not contain executable scripts, but the presence of external links suggests a phishing or redirection attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9850

Heuristics 5

  • 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.
  • 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://pistant.ru/uplcv?utm_term=justin+jessica+13+reasons+why
    • https://anmoul.com/userfiles/file/mawogijikolaborapuva.pdf
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/16075d4aa24219---97767897321.pdf
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/0976cd7d56f83be77f92279b7d237cc2/13700927830.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb2ecdfebf---jexurokizo.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1a548d98c1---kubunebupolafu.pdf
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/960d9cecad1eeaf577af1c56a2b24c2d/pitiwekutigepug.pdf
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cbfcf2cbe1b---pejikizamowokabovulo.pdf
    • http://hanarotalk.com/userfiles/file///11046067159.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/7c6219a7729d805c29b11f5a4883f8d9/89740806363.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ad878a22dc1---mitavadogegi.pdf
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8584b467cf---xisotirij.pdf
    • https://loctra.net/userfiles/file/53077699065.pdf
    • http://smcertificationservices.com/userfiles/files/kaxipodoxomokomoxupapaja.pdf
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a96c9428218---nitagelewofup.pdf
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c45c8d2d7a---jikipipuxenixa.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/k06vab3qhu6l2k2sc90p0865g1/1817338502.pdf
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b44ffdc8218---narezasekumitat.pdf
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607007ca5189e---toxikufizenas.pdf
    • http://robinsonfamilyreunion2021.com/clients/7/77/7769cd5c98d63cfb9738ae2db1c5c42c/File/tobulenikifukesiniz.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/sstovencmb9r0b8qn3vmv635k7/86746291899.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cede90f837---visurosikiravudafizegivub.pdf
    • http://remaining-mc.de/userfiles/file/poxaguxilolawenezas.pdf
    • https://heuresromantiques.com/upload/files/7413923279.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/guhl1oejo7rpa9596ke0n3v84f/95646780047.pdf
    • 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_off00034de8.bin
108b12dd7d5b768d093adde961fd9466a6453b97a60a732d92c3f85e65137c69
pdf-font-stream PDF embedded font (sfnt) at offset 0x34DE8 10924 bytes
font_01_sfnt_off0003675a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x3675A 16792 bytes
font_02_sfnt_off00037f6c.bin
68985dce4376bcdc86c3f0da331839b6433ff6a719a3dd9304652e9adc2cd71a
pdf-font-stream PDF embedded font (sfnt) at offset 0x37F6C 18244 bytes