Malicious PDF — malware analysis report

Static analysis result for SHA-256 abdd7226dfef39cb…

MALICIOUS

PDF

97.0 KB Created: 2021-06-09 03:05:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 48a3f94a0bdaf7846f449531242b5505 SHA-1: 5314eb48c4e502b15633f1ad9505486639e879f5 SHA-256: abdd7226dfef39cba213591ab01156b0df8fe260b0d61719cc1983e1b296a5c0
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crewmak.ru/uplcv?utm_term=achyutam+keshavam+ramana PDF link annotation
    • http://agcslohian.com/userfiles/file/77439951764.pdfIn PDF document text
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/91800582456.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073e7dd157fe---67488352083.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/68eca8fbe8c9097d18178e890bd202da/wapomuw.pdfIn PDF document text
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/28955037587.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16095fd965b47f---40938455434.pdfIn PDF document text
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/eif5u6pcbe45ic48rntfhivovs/tofisavukumurumumunoki.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094676336e09---16905386156.pdfIn PDF document text
    • http://igabana.com/upfolder/e/files/20210531234736.pdfIn PDF document text
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/40e8b44d3c7be0781047f3c08db22642/91285389679.pdfIn PDF document text
    • http://autoshiftbid.com/fckeditor/userfiles/file/davelizemosanuzifudarozon.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/fomorerefiwu.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607228371e012---30941202354.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/1d07b5e6cae9338f8b69f88c40804625/71999679088.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210527233644414.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/g4n4g92nq6hd0edc91qhn9qih5/vofevozerijef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.indictrans.orgIn PDF document text
    • http://fedorahosted.org/lohitIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108CE 5220 bytes
SHA-256: 4448a7751e9acde70d3ed5300c465fe97a207dc349cbfe1a49ceb75ccf416ba9
font_01_sfnt_off00011a70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A70 4468 bytes
SHA-256: 8b69a766a9e8ec7f291be8e936e0c374ba30e04bd1ba52ed2f33efc004b056ad
font_02_sfnt_off0001288b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1288B 17192 bytes
SHA-256: 1b2d7470f6aae39e4545d4fc4570011e1f4febbabffc6f2975e31db636067bf7
font_03_sfnt_off00015dc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DC1 7200 bytes
SHA-256: ed0b4e9e21ab7945910c786bda6cd07e9bca5532a51fc490313fe1fbc0cb80ea