Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f70909cdf6d59db…

MALICIOUS

PDF

85.9 KB Created: 2021-07-03 22:38:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 0837deac932cdfc432d2729f045c2c03 SHA-1: 375bb9819f68ab7237274e46766dd2bb43f3af84 SHA-256: 2f70909cdf6d59dba0674142f61ee846d8019a3e16a5b76b180d86e1f16b2c31
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs that point to compromised websites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and numerous external links are indicative of a malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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://smidgel.ru/uplcv?utm_term=the+smell+of+other+people%27s+houses PDF link annotation
    • http://bettaletroom.com/file_media/file_image/file/41202625747.pdfIn PDF document text
    • https://laughteronlineuniversity.com/images/upload/files/zoxutipujedumajaxep.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160866de96e119---36830119126.pdfIn PDF document text
    • https://aulacvn.com/upload/fck/file/52206172501.pdfIn PDF document text
    • https://cmsschoolkg.org/userfiles/file/wevikijegopovitenede.pdfIn PDF document text
    • https://fisheaglesafaris.net/pics/user/file/80412906038.pdfIn PDF document text
    • http://baodieptailor.com/uploads/2021-06-18/images/files/92155872573.pdfIn PDF document text
    • https://bachson.net/upload/file/bozorutibuwikejis.pdfIn PDF document text
    • http://barnesfamilyconnection.com/clients/f/f3/f37d50667a1bb99e511e26172889fab9/File/ribira.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/g7u889ropeba42ofnmlcivn0q0/30148457810.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085e9381dff7---71633011630.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080c80d0cf43---55255879187.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/85007508947.pdfIn PDF document text
    • http://ducthoaudio.com/upload/files/93417261604.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0807bca5b5---rabunelerubanaragadote.pdfIn PDF document text
    • http://jjburgerut.com/uploads/files/50461457628.pdfIn PDF document text
    • http://reikihaus.com/clients/75291/File/jogufe.pdfIn PDF document text
    • http://linkingpeople.info/userfiles/file/nodimujimixofamuwikinu.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4b9b11316d---33673349667.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/l7gh1rfn1uu3tvj5iamvjlgmn6/4104581685.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/608db4lg6hil1m0l23flfnj237/71407833149.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/kjbuhcgh4ivramnet9egrtv3o5/96780352765.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B4 17056 bytes
SHA-256: 05c2662621df6f708e45ebd03785ea839151508ddb1971130f2cb9e9243a3c8e
font_01_sfnt_off000105d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D2 10360 bytes
SHA-256: 21e6afb7f0a9cee53111d81a4ffb01137595af8687ff01fed215000a349d2b59
font_02_sfnt_off00011d4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D4E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001355f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1355F 16232 bytes
SHA-256: b646e4e99f19ac05519abaf59ecb91311bfd919e7d59cfb2ca623a477a188405

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