Malicious PDF — malware analysis report

Static analysis result for SHA-256 056a0f39795477ee…

MALICIOUS

PDF

83.3 KB Created: 2021-09-17 23:22:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: be0a781b81e17d4daa101dc92124d4d2 SHA-1: 591d3780d7252b118084b53254211c929f3444d6 SHA-256: 056a0f39795477ee7c3f9f6fa45ea1e9f2b5ee355476a78d2eaa21c564902668
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains numerous links, many pointing to compromised WordPress sites or disposable hosting, characteristic of a link farm used for phishing or malware distribution. The presence of embedded URLs and the 'Download Button' heuristic further support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://satakantaresort.com/user_img/files/61408568250.pdf
    • http://gnox.vn/upload/files/41793995511.pdf
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613d363c7000c---30008380364.pdf
    • http://dxczx.com/ckfinder/userfiles/files/20210913_181137.pdf
    • http://yuanjen.com/ckfinder/userfiles/files/36553188955.pdf
    • http://simsvizag.com/contentimages/file/nifazumo.pdf
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/201b61a7ac17a2c1514d930de789a5e5/71407137961.pdf
    • http://morgancountyoh.com/userimages/lilobogo.pdf
    • http://vinaktv.com/storage/ckfinder/files/rasaposewodiwu.pdf
    • http://xn--2-140-swe8h.xn--p1ai/files/68860952698.pdf
    • http://gavinlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/93483707502.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16130a8975a53e---62983144773.pdf
    • https://tahitotfaluovodak.hu/ckfinder/userfiles/files/8997446002.pdf
    • http://teifsepahan.com/files/file/genareguzizodesiw.pdf
    • http://movesearchesuk.com/userfiles/file/59299724858.pdf
    • http://juncheng.tw/upload/files/zokorobafetefonigabof.pdf
    • https://buildingexpertsdirectory.com/ckfinder/userfiles/files/jitufume.pdf
    • http://importfoodfair.com/userfiles/image/2021/09/file/98960746115.pdf
    • https://fizjolech.pl/userfiles/file/42781093051.pdf
    • https://tlkingatlan.hu/kepek/other/file/soxomotesadini.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=drastic+ds+emulator+mod+apk+download
    • 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_off0000e0c3.bin
192dd442865ea40d8450f95777875d419d658599302f23c9a11989238ffe1c85
pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C3 17520 bytes
font_01_sfnt_off00010dd1.bin
0617571a72ebd41898cc2415b414738a37b52234cf45e5baa1c93eeb7f0a2342
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD1 10952 bytes
font_02_sfnt_off00012749.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12749 16792 bytes