Malicious PDF — malware analysis report

Static analysis result for SHA-256 dedf42ab2e9cbabf…

MALICIOUS

PDF

151.7 KB Created: 2021-06-26 18:35:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bf6dfab6cc761591cabc8edaba912940 SHA-1: 0baafad819560f29091012eb53134ba7d8b2c1f9 SHA-256: dedf42ab2e9cbabfbada859d9a2810190f4dde23a94e46da6e305ee4d470c35e
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised CMS upload directories, indicating a link farm designed to host or redirect to malicious content. The presence of 'SE_LOLBIN_RUN_COMMAND' and ClamAV's 'Pdf.Phishing.Trojan' detection strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the PDF structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9708

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://asbufestival.com/uploads/FCK_files/file/66102328548.pdf
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160afc07f3a3cd---51080918723.pdf
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a74db40a3d9---34435161058.pdf
    • http://ctyrkolky-gamax.cz/data/dokumenty/92811267192.pdf
    • https://grupo-bahia-real-estate.com/ckfinder/userfiles/files/tarefi.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d074e235dee---89342757117.pdf
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/85ai96ep1aet9qnouu6cmdv8h0/92629486779.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607a69446e0a0---bosugas.pdf
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/07072e0c38706a43c82435c9e8cf7448/60049280834.pdf
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160c7a95feb698---lurudi.pdf
    • http://cn-daomeng.com/upload/userfiles/files/a0b2871486fb8463ffdada7bc3d82e68.pdf
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/d7c148nplh6dksmhf4m5196hu3/54531586959.pdf
    • https://pharmnet.cz/ckfiles/files/files/7599011059.pdf
    • http://gleneaglehoa.org/images/file/58004296959.pdf
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160cf3aa1287a4---modogeg.pdf
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/tboq1qi2dnh5rui9h2bg268av3/16154604370.pdf
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a00122b534b---razej.pdf
    • http://zabradli-znerezu.cz/userfiles/file/38824149207.pdf
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/dbda412c8a4b1d61269a64b61032ab95/nojewobopejixoxuzom.pdf
    • https://chp-travel.ir/data/file/33199780709.pdf
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160b44a138e7ea---94651420971.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff13248c1d---sazuforagofaj.pdf
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ac12480d794---gevudimobalawil.pdf
    • https://feng-shuiworld.com/userfiles/file/wotelotezow.pdf
    • http://adanateknikservis.web.tr/wp-c
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=top+notch+3+third+edition+student+book+answer+key
    • 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
stream_002_off0001bb6f.bin
eaea68a12c729fa73715ea31c162c3d22b626ea829459af30bf79518ed5f486c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1BB6F 26936 bytes
font_01_sfnt_off0001eb6e.bin
013686e09f544957987f97a19c0f784057fb3f0f7818c0ff9a4d475896e17a37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1EB6E 11232 bytes
font_02_sfnt_off000205a3.bin
c70fd553cfca88f17b2fe4bbf93421a9e10542ac5f93cef39f01d6f6588b41ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x205A3 18384 bytes
font_03_sfnt_off0002360b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2360B 16792 bytes

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