Malicious PDF — malware analysis report

Static analysis result for SHA-256 f81dc2cbb94ce7f4…

MALICIOUS

PDF

71.2 KB Created: 2021-02-17 20:53:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b01c1f1bcf98d1eaa6d38a039617b341 SHA-1: 0ccd6f166a79280ec80716119ae0add9385e10be SHA-256: f81dc2cbb94ce7f404a6cee7aa77abe0d9525ca12e547d451470f5953dcce33a
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jacksth.ru/wix?keyword=words+starting+with+ad PDF link annotation
    • https://cdn.sqhk.co/dubutemaruxu/hh2hegj/bucket_list_things_to_do_in_colorado.pdfIn PDF document text
    • http://moitender.org/fosirazuwirevunokeu50ml.pdfIn PDF document text
    • https://xopilujipuwoka.weebly.com/uploads/1/3/4/8/134886601/69b4bef.pdfIn PDF document text
    • https://cdn.sqhk.co/peruvereraba/jbghhfQ/yamgun_mod_apk.pdfIn PDF document text
    • https://gusemotasejodab.weebly.com/uploads/1/3/2/7/132741535/lufotewinedutawi.pdfIn PDF document text
    • https://cdn.sqhk.co/mawedabe/4hfgjMI/kimotixoruwabus.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/c4hjhg1/47040370712.pdfIn PDF document text
    • http://top-salez.site/349856535820zlpv.pdfIn PDF document text
    • https://cdn.sqhk.co/rogekanus/gfggiiV/original_rollerball_cast.pdfIn PDF document text
    • https://cdn.sqhk.co/kawonidoza/4UdL7Op/weekend_getaways_in_palm_springs_ca.pdfIn PDF document text
    • https://punufepezakuba.weebly.com/uploads/1/3/2/7/132740965/00a9fa5e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pozokimepe/31272501403.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/44760463249.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/wells_fargo_401k_hardship_withdrawal_form.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/43254896700.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/12846500912.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/asamanya_balaya.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFED 4832 bytes
SHA-256: 18818c86365b25ba5b24f3bcc3279289b31328dc397b9da0e46bbc0cfee208c5
font_01_sfnt_off0000e05c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE05C 9748 bytes
SHA-256: 62bc08bb9ee839295b9fcc5374c70fcde58db742d77eccecd9d4c0fdbb6a9167
font_02_sfnt_off000101c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C0 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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