Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aa0ede1be9e2e18…

MALICIOUS

PDF

82.8 KB Created: 2021-09-23 18:00:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: b3acc83cfede505b7b1ad3a43a5ec16d SHA-1: 6f5c51063c5d31f237d0807fcf6cd2ea928e28f1 SHA-256: 7aa0ede1be9e2e18b81f3d9197d26014036caf2d4213bd519822a301d44e219a
156 Risk Score

Malware Insights

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

The sample was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to various domains, many of which are associated with link farms and compromised CMS uploads, suggesting a phishing or malware distribution scheme. The PDF structure and the presence of multiple external links strongly suggest it is used as a lure to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://huntic.ru/uplcv?utm_term=appium+adb+commands PDF link annotation
    • http://atsrealtyvietnam.com/upload/files/nakiwirewoxenuretokab.pdfIn PDF document text
    • http://pm-ural.com/uploads/files/31984792152.pdfIn PDF document text
    • http://highspiritsmusic.com/ckfinder/userfiles/files/2320896360.pdfIn PDF document text
    • http://intersonik.eu/upload/files/wewivilur.pdfIn PDF document text
    • http://deauville.ru/files/file/xedilurebidatefifejozo.pdfIn PDF document text
    • http://omatsuri.kr/data/userfiles/files/97338971497.pdfIn PDF document text
    • https://profession-your-dr.com/uploads/files/202109040758022748.pdfIn PDF document text
    • http://paoladebenedetti.eu/userfiles/files/wuxolu.pdfIn PDF document text
    • http://xnucleus.com/members/member_images/files/71167826054.pdfIn PDF document text
    • http://savalis.ru/userfiles/file/wulexemujuk.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132612225e57---motigedozivajogibo.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148b24765d51---jojuvepelep.pdfIn PDF document text
    • http://hanyangsteel.com/files/fckeditor/file/230768942614a02eba81d1.pdfIn PDF document text
    • https://vicotelecom.vn/static/source/images/file/53197425029.pdfIn PDF document text
    • http://cctechlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sixesajiwiradejoma.pdfIn PDF document text
    • https://skl68n15g-n2ox.com/contents/files/jegapujufodawipakulisu.pdfIn PDF document text
    • http://patanamachine.com/imgUpload/files/63852936082.pdfIn PDF document text
    • https://eltechma.com/zdjecia/fck/file/zetifevetutilidosedef.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/20219131937396956.pdfIn PDF document text
    • http://laserbeautymachine.net/d/files/ritabowefobaxidotokidisiz.pdfIn PDF document text
    • https://roshnaai.com/ckfinder/userfiles/files/kogobimunana.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16140f4240a329---95469383438.pdfIn PDF document text
    • http://ramenzoni.eu/userfiles/files/20509342501.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD969 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF180 10520 bytes
SHA-256: 705aca4fb715b3d89ea5155a70e15e66c2be72b45e94ccf85af7c3897cf9cad9
font_02_sfnt_off00010929.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10929 19804 bytes
SHA-256: b4d00b88ed31b90a200dd9c26d79d21f07336a248199470dcf798acad90bf4c7

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