Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c49315008809706…

MALICIOUS

PDF

106.3 KB Created: 2021-06-26 15:42:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 45f3f4c514a03d8f7cd6134cebeaf219 SHA-1: 53e5f79a3ba2da91a52171d018eedeaf0ee8cc5e SHA-256: 7c49315008809706e256a5e304bd2096bd67f104874809931ab54c26c1e85ddc
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The file functions as a link farm, containing numerous URLs that point to other PDF files hosted on compromised websites. These linked PDFs are likely designed to lure users into phishing scams or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://crysiq.ru/uplcv?utm_term=how+to+memorize+quran+pdf PDF link annotation
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/2785f444de25c644a80e604e4d97616f/kuwigoviwezikera.pdfIn PDF document text
    • https://schmitz.cz/res/file/86427800606.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/643ebe98161e19e15a4fb6161e133e41/44432417826.pdfIn PDF document text
    • https://ivanamihic.com//files/zelururazogigetopetaxa.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/eefac47fb3bfa5fa60bc7419bc40c3b4/gixuxipoketejesalo.pdfIn PDF document text
    • https://ovalpolycoats.com/media/biresexulutatipare.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/d5d84c669cab3c82e7fb3d9723c85ebc/65889617859.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/b4b3bb9bae6ab5bbc13812bbf9cb3ee6/rigerediwemowadelejofa.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/xotojemifagogezaled.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/cee1da8027a775bde42d01ab94fbe31f/babubaso.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b17eb7ca45---wapewajiluzawozodubed.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/4907e67508542d6fa809a647ac3da285/38943443881.pdfIn PDF document text
    • http://turnyras.lt/Files/file/ruzafuroneredux.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/16091b24305369---xuzaz.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160be6affd49f3---pupoverobu.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160717c2f38f8b---51544005371.pdfIn PDF document text
    • http://perseverance.cyou/updatefiles/file/gatadekod.pdfIn PDF document text
    • http://phantasos.org/userfiles/file/zenedijuvitax.pdfIn PDF document text
    • https://hzautomatisering.nl/userfiles/file/velatutubito.pdfIn PDF document text
    • https://codecs.roimages/file/supigum.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00016895.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x16895 17944 bytes
SHA-256: 713fdcec781bc1550c206c07bdab90842d4840f9491395ca693c17f40acf2c96
font_00_sfnt_off00012083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12083 10828 bytes
SHA-256: a4e302d500b1e9b69336fd95101847bdda5002aa6511b7812765cda4d64519c1
font_01_sfnt_off0001393e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1393E 18696 bytes
SHA-256: edda95f9d4fd5d85f442624910a3409c32012c83f414ae175c43da4a345682f3
font_03_sfnt_off000183ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x183EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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