Malicious PDF — malware analysis report

Static analysis result for SHA-256 30e25f6a0eb00912…

MALICIOUS

PDF

76.8 KB Created: 2021-03-31 13:49:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: af70ebcad3ed0ca3119bbb310edc969f SHA-1: 122b51c3c54790624cae1fbab233ae823793784e SHA-256: 30e25f6a0eb00912e9926fbff4119b7d5441c52e2f1f17d81765b0c724759bfd
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://fokemale.ru/strik?utm_term=acer+t2+t232hl+abmjjz+23-inch PDF link annotation
    • https://lazoseroli.weebly.com/uploads/1/3/5/3/135316949/rafinixisino.pdfIn PDF document text
    • https://mitafomanamo.weebly.com/uploads/1/3/0/9/130969747/rudaguxifed_toxenuwuwilinir_gikud_rukidijalovini.pdfIn PDF document text
    • https://wawodupalise.weebly.com/uploads/1/3/4/6/134621762/sotuguw.pdfIn PDF document text
    • https://lifitexuga.weebly.com/uploads/1/3/4/3/134356919/3fa1c792.pdfIn PDF document text
    • https://dorugemapakew.weebly.com/uploads/1/3/4/6/134680888/3363002.pdfIn PDF document text
    • https://wufijoduk.weebly.com/uploads/1/3/2/3/132302847/708f5.pdfIn PDF document text
    • https://favexolifuluk.weebly.com/uploads/1/3/6/0/136092880/997da81d0284b5.pdfIn PDF document text
    • https://zavomejuguz.weebly.com/uploads/1/3/1/1/131163615/jaginubofufodu.pdfIn PDF document text
    • https://rofibefis.weebly.com/uploads/1/3/4/1/134131293/3432888.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/wipotegadodorek/43225556397.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed705507-baf5-4486-bd2c-2b0b03df0c47/geganuvomofi.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/how_to_cook_rainbow_trout_recipe.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/35755022482.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/43683354676.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5df1cd7-c21b-4c68-9171-f3ec6044ff9d/61888294645.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/synthetic_leather_fabric_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/65477730572.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/338128fe-78e0-4367-af7e-c80dafd1f529/computer_hardware_devices_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/are_quartz_infrared_heaters_any_good.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bb3ae0d-72bb-464a-98a8-85448186d201/nituvikedesipiwaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1627b65-75f6-4642-b8fb-eee819c91155/what_is_median_family_income_mean.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_off0000ec13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC13 5444 bytes
SHA-256: a5a402d10c396906fd20172d83c23bb981ce7f6213214dd3d1f935c19ca37d8f
font_01_sfnt_off0000fe84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE84 12340 bytes
SHA-256: 17761b01e3cca07e32e5940cbb23c8e3b50972e4610e8031f632812c397fe486

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