Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c6d60f3f706d52c…

MALICIOUS

PDF

90.9 KB Created: 2021-09-03 07:51:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1fbf2fb9c3163cb41b93c89beadc0970 SHA-1: 6c086ffd248f455f5326df36d3b9709959c64a10 SHA-256: 0c6d60f3f706d52c724b7090a278b842ee5e0bb7ac6a7fab38104f02ef3b4f48
156 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users. The PDF structure and link farm behavior are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://thefertilizergranulators.com/d/files/2000949904.pdf In PDF document text
    • http://flygarfield.net/userfiles/file/27800256543.pdfIn PDF document text
    • http://drukarnia-skawina.pl/app/webroot/media/files/posisoroka.pdfIn PDF document text
    • http://lesen-und-schenken.de/userfiles/files/mitogeviwazosafuguze.pdfIn PDF document text
    • http://goldstecq.com/userfiles/file/pixijosozezuboguge.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c50a342df21---gepalogupelujoxun.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612573ea0f48e---jobepo.pdfIn PDF document text
    • https://briljant-maleri.se/UserFiles/files/xejite.pdfIn PDF document text
    • https://brazilairporttransfers.com/ckfinder/userfiles/files/89921405028.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608905e50cf3a---7753766085.pdfIn PDF document text
    • https://fultoys.com/userfiles/dawikezexumuvifel.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/l3tnu7ckg8ffvt5mrb0iigs5h9/nameturovigapubupigoxipu.pdfIn PDF document text
    • https://gyn-koe70.de/obrazky/file/kaxurabukapeju.pdfIn PDF document text
    • http://dagmare.de/userfiles/file/rodefukibewimub.pdfIn PDF document text
    • https://immo-macedo.lu/userfiles/files/jetuvif.pdfIn PDF document text
    • https://pmms-online.com/assets/file/lepexulu.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/41063d3883157fa6fa1dd89086a5b212/gaduxogepe.pdfIn PDF document text
    • https://www.vpn-solutions.com.pe/ckfinder/userfiles/files/45449191159.pdfIn PDF document text
    • http://hoacanh.net/luutru/files/64684208342.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad906c93a02---sisezadige.pdfIn PDF document text
    • http://espicycooking.com/files/file///93439977218.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/rovafix.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/921c497ef0f9c4dfad9b86b8d4704cc9/wulosajelafudi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=united+states+of+america+constitution+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE91 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000116a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116A8 10840 bytes
SHA-256: d1dddf2a6d77d508ded43932c2a9c34231d26e8a5863aebd3141b67b5c6b1c2e
font_02_sfnt_off00012faf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FAF 17740 bytes
SHA-256: f0252ae997fb59b28707be08711b19a881b60bd1644a22a150c9884239e4f22b

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