Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd76be8375a5e93c…

MALICIOUS

PDF

73.8 KB Created: 2021-06-29 02:17:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8e67b02a04720f89e8cd2df1d2af7f40 SHA-1: 17e8034f67624d5ab1ec48aef57ac7480855391c SHA-256: bd76be8375a5e93cfb7656c1cf2dd03930c5f92fde00f4611c6f01197275ecc6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It functions as a link farm, directing users to multiple compromised websites, some of which host PDF files. The presence of external URIs and link farms on potentially compromised CMS uploads suggests an attempt to distribute malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fcf8a48386---67833965490.pdf
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/o80t4u98rc83jt1rmch33cjgf5/tegasamozotigagizitoru.pdf
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160bc360ad841d---xumezatenosabidakozop.pdf
    • http://emotionpicturesfestival.gr/userfiles/file/42399395277.pdf
    • https://qpshouse.com/upload/image/file/miwifikubozemakesofizig.pdf
    • http://garderoba.sk/images/_file/falom.pdf
    • https://binarbaidfabrication.com/public_html/userfiles/file/fotobiferuparuxogasora.pdf
    • https://directorvincentchow.com/fck_filemanager_upload/file/34124718867.pdf
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/jldgm4a5g88ara5uafm6a0f9i4/pojazabubef.pdf
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/99f8cd92dbe7b309d4d93749b791d3a6/4416077400.pdf
    • http://sequirk.ie/userfiles/file/gekekasoxuliline.pdf
    • https://atphp.ch/userfiles/file/18607650199.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606f49e4c14eb---66618217562.pdf
    • http://kleiberit.ru/files/file/zuvikedemazisepasanejow.pdf
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bea6d7056ad---89560350566.pdf
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb4090cbb5---rododisawedusuvorutisezog.pdf
    • https://tootooair.com/FileData/ckfinder/files/20210614_E8B57C77EA1F6C94.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1d4131ef90---6005296931.pdf
    • http://autoshiftbid.com/fckeditor/userfiles/file/77481643881.pdf
    • http://logo4you.dk/userfiles/file/73840454222.pdf
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/58214017081.pdf
    • https://eyetracking.pl/userfiles/file/wupapurivaminavafinalorim.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=after+2+full+movie+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c10b.bin
62d301f7112422ba1a19a94b14b8374cc432114ffa8dd991b09eb4a9ba33f1eb
pdf-font-stream PDF embedded font (sfnt) at offset 0xC10B 15664 bytes
font_01_sfnt_off0000e948.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE948 16792 bytes
font_02_sfnt_off0001015f.bin
ab720241f2b5b62f372150b9cb8c608844d98a7dc95d4010184e305a7badfec1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1015F 10700 bytes