Malicious PDF — malware analysis report

Static analysis result for SHA-256 da0a14f362549e0d…

MALICIOUS

PDF

97.7 KB Created: 2021-06-26 03:02:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f5865570d8954b697f6da2eab3fc191e SHA-1: fa82ec4a8fa34309dc8e37040b8565859ee671f8 SHA-256: da0a14f362549e0dc1fcf79b2f8c96c0f5094fd5eab0b4678f090c87a46aca7a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting an attempt to redirect users to malicious or phishing content. While no scripts were explicitly extracted, the presence of numerous external URIs and the ML classifier output indicate a high likelihood of malicious intent, possibly involving the exploitation of PDF vulnerabilities or social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9898

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 http://greenlivinggarden.com/htdocs/UserFiles/file/52022003998.pdf In PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/nampdrv7a6736d6pkg0291omc7/rebemulivegi.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/50df09f591a9924b49a3198f922398cd/72801579537.pdfIn PDF document text
    • https://fceresources.com/ckfinder/userfiles/files/79252414411.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/c0b6bde29300f9fe37d4220c80603041/86572958049.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/bilujubezukenogebabadeva.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/a7c45ce9c6f257049f85b412b1f24571/70275533895.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160897298a102c---fugolox.pdfIn PDF document text
    • http://liyangah.com/Upload/file/30982236103.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/c05c1486b31fcebc0add583592dd66b8/bidalupapasipo.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a260aa72ee2---53606773592.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/43b81ef2d52b39956a6acd10981bd326/lufiwenubipufomegagafam.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606c98b3cee99---49468828584.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/68731919591.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/47479b59bfc65066e4c699d20be983b2/43230026711.pdfIn PDF document text
    • https://natyabio.com/uploadfiles/xezavizutebuzufobuxigove.pdfIn PDF document text
    • https://pensiunea-escape.ro/ckfinder/userfiles/files/61921392505.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021060622142065.pdfIn PDF document text
    • http://benedictinoselrosal.org/ckfinder/userfiles/files/nadekunimeraturodanuko.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/94550761736.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=abscissa+meaning+in+mathPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00011c73.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11C73 18328 bytes
SHA-256: d9f5e66163d907df9b2c2f031b8906ab183602eda4757f3e8ef428a9cf922d60
font_00_sfnt_off0000dda3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA3 25624 bytes
SHA-256: 4680ac0bd21d2dbe10a9a8242720827e0fa7d73a34d9a4941fd1ff3978decdf5
font_02_sfnt_off00013a15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A15 10532 bytes
SHA-256: beb37405939473d2477b3836946e65c8bc8e280712ca672f8711ce20038f1a96
font_03_sfnt_off000151f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off000169ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169FF 3464 bytes
SHA-256: a8161c2f5ba9235eb51b4fcc43b6bb219725019365cb8d38f9ec25dfe5ce54ff

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