Malicious PDF — malware analysis report

Static analysis result for SHA-256 70d0275a00184bce…

MALICIOUS

PDF

99.4 KB Created: 2021-08-13 20:06:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1bc0836d85ef932cb50e2cff2596ca5e SHA-1: fb1fb68b9c637903f3a80ce9e3fb4762af304929 SHA-256: 70d0275a00184bce5c197e8e4eb75c5fc801796bca445b5d2173f4435da8de3f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to compromised websites, many of which are hosted on disposable domains or use link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a tactic of directing users to malicious content, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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 https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a932336958b---zozuxekedituvisavoligubek.pdf In PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/ko06jdd7vji8ndar8rl48j28bs/pununufigusilagisixaro.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608561c6d048c---27316254587.pdfIn PDF document text
    • https://tenshinorchids.com/FCKeditor_upload/file/tojimukunojuwat.pdfIn PDF document text
    • https://fundacionamigosdelmarcaribe.ong/ckfinder/userfiles/files/38352102268.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f7843c67a---23962353929.pdfIn PDF document text
    • http://iwishop.hu/file/vipuzekotinute.pdfIn PDF document text
    • http://hagelkonzept.de/userfiles/file/22140089863.pdfIn PDF document text
    • https://cihangirhotel.com/upload/ckfinder/files/fawefiki.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb4d1c2367---85676520720.pdfIn PDF document text
    • https://infotechb2blite.com/bot/ckfinder/uf/files/ribaxuzefidik.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c7708db2e7c---bebafazaz.pdfIn PDF document text
    • https://thic.muki001.com/plugin/ce1/ckfinder/userfiles/files/49910603953.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098be6884c58---22929179966.pdfIn PDF document text
    • http://luisacortesearchitetto.it/userfiles/files/tatewuwudezilizi.pdfIn PDF document text
    • http://juha.be/_files/file/73582127708.pdfIn PDF document text
    • http://teckim.it/themes/userfiles//files/55822571696.pdfIn PDF document text
    • http://chiaranannini.com/userfiles/files/polujativajegusotiwaz.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba72a341bf---javemozom.pdfIn PDF document text
    • http://dailyxedayhang.com/userfiles/files/gamesurimoz.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/tebowavubamibisolosuw.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c6faff53153---gabubilaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=volkswagen+amarok+owners+manual+pdfPDF 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_off00010ae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE3 17352 bytes
SHA-256: 66daa104e6da0286ff4cc411ea482b50d49e0decf2fe2666d2c9452edabd5576
font_01_sfnt_off0001388e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1388E 16120 bytes
SHA-256: 72e58e80a4152405c74c8953ed95edbeb859be76cd90eb6409ee0451594cfc2a
font_02_sfnt_off00014df2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DF2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00016609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16609 10900 bytes
SHA-256: 7be93e41703709db4815b1a2b5175aeb438336b8f7d732554aeb3b8e4a79a39a

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