Malicious PDF — malware analysis report

Static analysis result for SHA-256 775d17d752f36adc…

MALICIOUS

PDF

74.1 KB Created: 2021-02-03 04:08:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c7a948594d1507ee7abc209fafc805a2 SHA-1: c4a13a9bc5a772da3950511fb4842bc41ddb2a0b SHA-256: 775d17d752f36adc75cf0d7cfee37772df6956935ced08af9c8d30a6e7e2c53f
156 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a link farm, with the primary lure being an "ffxiv tanking guide". The ML classifier and ClamAV detection strongly indicate malicious intent, likely to direct users to malicious content or phishing sites. The presence of numerous external links suggests an attempt to distribute or host malicious payloads or facilitate phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/123?utm_term=ffxiv+tanking+guide PDF link annotation
    • https://widajuzuno.weebly.com/uploads/1/3/1/6/131637349/durofogulonegi_refez.pdfIn PDF document text
    • https://tujuveduveb.weebly.com/uploads/1/3/1/8/131871390/3982196.pdfIn PDF document text
    • http://myfavoritesun.xyz/tracing_letter_worksheets_for_preschoolersp4xwe.pdfIn PDF document text
    • https://tajuweselu.weebly.com/uploads/1/3/4/3/134362517/67ebd20bcbf.pdfIn PDF document text
    • http://trickyturkey.com/goddess_toning_program_free_download2533f.pdfIn PDF document text
    • https://sojuvamufivuleb.weebly.com/uploads/1/3/0/8/130874470/banifakoravu-wibijolusub.pdfIn PDF document text
    • https://vawuzusafut.weebly.com/uploads/1/3/4/8/134863851/5518282.pdfIn PDF document text
    • https://mugabezimezik.weebly.com/uploads/1/3/4/2/134235171/380469.pdfIn PDF document text
    • https://talunijepi.weebly.com/uploads/1/3/4/5/134599753/xipuveseme.pdfIn PDF document text
    • https://galinigogazefu.weebly.com/uploads/1/3/2/6/132695851/kuxarijomago.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gudukupir/64104315655.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/romewafedozepowuv.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/filorga_time_filler_sheet_mask.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/50715053655.pdfIn PDF document text
    • https://s3.amazonaws.com/minegikukovel/black_chokeberry_leaf_information.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/dawes_touring_bike_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/aix_rpm._rte.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/54999868860.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/12139313225.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e68c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE68C 4916 bytes
SHA-256: ab13a1127bde3534d4e1faf23647f4a19650f7269327f8f9e1b2df007abcacba
font_01_sfnt_off0000f773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF773 10548 bytes
SHA-256: cf25a9b8d861c468ca55daf6702dfdd0133e7cd0788da286baa29282bc6534b9

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