Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa22c89edc00aede…

MALICIOUS

PDF

85.3 KB Created: 2021-07-21 18:04:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e709c3699fca3a5dc6504f60c99d42c7 SHA-1: e060761d3f4597312d3e6cae7b002161e99e561e SHA-256: aa22c89edc00aede7dbd7bda737bbb4444e58fe2ae7770d8560ba6eb47dfa85f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://vibangthuaphatlai.net/uploads/files/pizegomeravuv.pdf In PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/380f5d4193a05d977fafa6a361db3663/rilesifu.pdfIn PDF document text
    • http://buergerforum-tirol.at/file/82445867579.pdfIn PDF document text
    • http://byty-pardubice.eu/UserFiles/File/6092049227.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/aaa90b26e35a4cbc6d50986ce4ad069f/gojupeloduruselajutaret.pdfIn PDF document text
    • http://polskienarty.pl/data/aktualnosci_imgs/file/88668386209.pdfIn PDF document text
    • https://medtek.vn/storage/file/27983611707.pdfIn PDF document text
    • https://chupwo.com/editor_upload/file/57943774128.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16099fe424ecf3---pagumapabobux.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c02f3315de2---53793785766.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0a23c1589---domaraweworomusuviso.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/cb095cdf51fffe7c70e4569cfa6f8b63/36961435006.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/pkp6gvcltg3nv0287m4erdv6n3/23419259514.pdfIn PDF document text
    • https://tigercabinetry.com/wp-content/plugins/super-forms/uploads/php/files/b2061b9d79983536e00050d9a025ec9d/7194710710.pdfIn PDF document text
    • https://samsungdvm.net/upload/ckfinder/files/vawasitikogasufugeto.pdfIn PDF document text
    • http://bioaec.com/userfiles/files/putebozibalo.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/7769feea993560697b26c6bff3272a94/zomomofepete.pdfIn PDF document text
    • http://chipublichouse.com/ckfinder/userfiles/files/dijudezalewux.pdfIn PDF document text
    • https://hr-serdahel.hu/images/file/39652953033.pdfIn PDF document text
    • http://majortaylorride.info/images/uploaded/file/detakixobumos.pdfIn PDF document text
    • https://banghenails.com/upload/file/suveso.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/vs59f54sb173n6n9qa5q8t2fcb/18661554317.pdfIn PDF document text
    • http://zetrade.cz/userfiles/file/bulun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=chillers+and+cooling+towersPDF 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_off0000e95c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE95C 16600 bytes
SHA-256: ff14d1efb74be806f4d1efb533653400f8351fc1a52e9b845951a7b9dab8f983
font_01_sfnt_off0001147c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1147C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C93 10764 bytes
SHA-256: 9bdb4ac18f9b4ba0fe573104b98292fb2be8d1b54996100a857af83058100a14

Open this report in the interactive analyzer, or submit your own file for analysis.