Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a1366ff409fa730…

MALICIOUS

PDF

85.8 KB Created: 2021-07-04 17:01:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6fdbba221e691301211c353b9a6d2852 SHA-1: d842c3bc4eb4430af923422a23d02f635180c56e SHA-256: 9a1366ff409fa730f627cfb70561df4d3233a79fe56ca99d361d16bcdbef0a13
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The 'SE_CLICKFIX' heuristic indicates the document likely attempts to trick users into executing commands, a common tactic in social engineering attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://philabc.ru/uplcv?utm_term=how+to+remove+password+from+pdf+free
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae4cd2480d---vumepego.pdf
    • http://vankouwenenmastop.nl/UserFiles/file/45287670446.pdf
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/thcpdl01siojo7e8nosopan30v/55019102789.pdf
    • http://zonweringbelgie.com/ckfinder/userfiles/files/48233870081.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/u37bceqv6u2hdphk8e5guo13e6/kezewotenofaxud.pdf
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160ab3643b9d51---vegoratutaxoxunem.pdf
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/i9psf3q4fe92dm11cl28mn2hn0/wuzidanewofunim.pdf
    • https://alexandrapanayotou.com/web/images/static/file/ronepupunasosuriwizog.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/f2acc9843ec9d8df56273fb0807a9ba4/7039817650.pdf
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/vezepenufumetosudir.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/b2b9cf68fa2901072970f10c4d5d600b/9842938073.pdf
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160aec66f0dbe0---bamatotedubewoju.pdf
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/ecbe0a65272ceb98c02999be29cd743a/42527622156.pdf
    • https://fereshtegan.net/basefile/fereshtegannet/files/kujezuwiwuwekozizanux.pdf
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/766e71c91225a5d5a6338032acf156d4/66038705187.pdf
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b9bf2d2e57c---doxikokosozazumi.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079fb75b05e1---tunegulojujozab.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/j14j9p24rbdogrbs5hfrto2vd5/zagijogobojopavovi.pdf
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a8ad208185b---fafivejaj.pdf
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607536dae0266---fatisarivibomuxaf.pdf
    • http://www.irrv.org/uploads/files/79341176568.pdf
    • https://dadesigning.com/daduserfiles/files/rinekesudetefojiwuxojes.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/9cb65228e76fce85fb2b33b76896ee48/56711256479.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_off0000ee55.bin
918d22aada10ecef5957b4e72f6311b24d910eece87e70de985916e6b8f202c7
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE55 10560 bytes
font_01_sfnt_off0001067f.bin
e84a7765db36bb1a4635056f48f3350690285ac1af8c4b837a637356052b7c57
pdf-font-stream PDF embedded font (sfnt) at offset 0x1067F 17040 bytes
font_02_sfnt_off0001331c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1331C 16792 bytes