Malicious PDF — malware analysis report

Static analysis result for SHA-256 95ffa74a200186a8…

MALICIOUS

PDF

97.9 KB Created: 2021-07-13 08:01:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 15653ef09eb6bffd3cdbabf6b97e0477 SHA-1: c88f0fcdee030705cf458cb555927e9961048319 SHA-256: 95ffa74a200186a879aa35aff339b34d868f5411d217f636b3fe0ca96c7fda0c
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. The heuristics indicate it functions as a link farm, potentially leading to further malicious content, and includes a callback lure consistent with tech-support scams. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious sites or initiate fraudulent interactions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

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
  • 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 http://saltokisport.com/uploads/files/76870163604.pdf In PDF document text
    • http://asupuro.com/user_data/image//file/94308431320.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/u28k97pl821gnvhjknfp5kdaav/38733326918.pdfIn PDF document text
    • http://hurtglass.pl/upload/file/55390742405.pdfIn PDF document text
    • http://www.greddy.com/admin/common/ckfinder/userfiles/File/xegiliramomujepibupu.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160728947de9a3---zusejijevakidikuku.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b5ced982d60---xojunuw.pdfIn PDF document text
    • http://planetamama.ru/files/file/binerawiwadiz.pdfIn PDF document text
    • https://deltarents.com/upload/ckfinder/files/nuzatupud.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/kadofaxejadetifini.pdfIn PDF document text
    • https://10kshot.com/customerinterview/ckfinder/userfiles/files/ninevobufasubuf.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/tuxonofijotadego.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16091850a3f121---60392161695.pdfIn PDF document text
    • http://tbm-mova.by/images_from_html_editor/file/79133151591.pdfIn PDF document text
    • https://napraforgohotel.hu/upload/file/14592015304.pdfIn PDF document text
    • https://srmhospitalities.com/images/bulk_images/files/62673181637.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/35216869044.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092ec177eb62---74136292900.pdfIn PDF document text
    • https://carrieres-pierre.com/userfiles/file/60770178032.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/0d4bf86ab73d35e0ca1e5b3882ac2538/19498102183.pdfIn PDF document text
    • http://quick-thailand.com/images/uploads/file/82619909541.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a30d53499b6---bunitorovur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=gundam+ibo+all+mobile+suitsPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11213 17636 bytes
SHA-256: ea1348a0deca44b6634bae686e3a0b0877dc791c191d0ac86e0d47cdc7550cfe
font_01_sfnt_off00013fe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FE4 10588 bytes
SHA-256: 1959eb18a6ab5ba7c5b7309fcfb7156bde499f21087e8564456095ed2d0765b6
font_02_sfnt_off00015805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15805 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00017012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17012 2244 bytes
SHA-256: 7c1fed1279ffa82ccc5eceb5f1da6aee748629a12311adb06ba630c5488c3179

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