Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c2a2a99859f2a07…

MALICIOUS

PDF

89.4 KB Created: 2021-07-03 01:49:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bcd3431c436abb13a83fcfba5724e5c0 SHA-1: 1b30f3f5843a081868f5702a26d218a04570e16d SHA-256: 9c2a2a99859f2a072c5ee8ebe5d6f4ff03578b8641d735a1f1488396f2687c1d
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised WordPress upload directories. The document body is heavily obfuscated, preventing analysis of its specific content, but the overall structure suggests it is designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc3a88ee49---fixolerajuxojepamituzo.pdf
    • http://meble-tk.pl/userfiles/file/86595237489.pdf
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/38f5a40c46e2f9216f52b7d8fd8b7af0/2666641690.pdf
    • http://5m-tti.com/uploads/image/files/dedawisazeketi.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a8ef9aff6f---wapefegez.pdf
    • http://teresachild.com/upload/files/59849528997.pdf
    • http://animalscipublisher.com/files/upfiles/file/kitabimazurefenusaze.pdf
    • https://adamant54.ru/userfiles/files/bamofutazabeduji.pdf
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1ff563478---vilizil.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160a1474e8d7aa---64660908848.pdf
    • http://slsnn.ru/content/file/80860346930.pdf
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160815d3074950---kabozeroxotasesuw.pdf
    • https://airbays.com/userfiles/file/lilobazowi.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16070fa41c44ce---89916877597.pdf
    • https://ikuseikyokai.jp/ckmedia//files/nefusoderufo.pdf
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/8bne2ji17gak9kcurbks6k48t4/95089547707.pdf
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4f490cd1f5---bevol.pdf
    • https://parokisantolukas.org/Uploads/userfiles/files/xabiw.pdf
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160871cfe778d1---97017524480.pdf
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/hftkp8c0dlp892fa8ul2q5bil5/84933536898.pdf
    • http://lycee-elm.org/userfiles/file/fimesaruw.pdf
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160841b8484fba---tibazagun.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093f3e080b36---sanimawakomipalujomakav.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=why+did+van+gogh+paint+the+starry+night
    • 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_off0000f9c7.bin
5b81914a958151d3e374cc70e3f7edf739ca2db5533f2dc3bf606b3b63624992
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C7 16944 bytes
font_01_sfnt_off0001257f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1257F 16792 bytes
font_02_sfnt_off00013d96.bin
5ca71bc970f1ada834c6932bdfa55f2ee390dc5c96e80cc28c680ba75a456bb8
pdf-font-stream PDF embedded font (sfnt) at offset 0x13D96 10796 bytes