Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9ca4a222b7069a9…

MALICIOUS

PDF

77.3 KB Created: 2021-03-04 12:15:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 7b5797c64914bb784bb1fc90b88ecae2 SHA-1: eb064f89e666c16a71e0ec2e9d1e6f393b76bf95 SHA-256: c9ca4a222b7069a981667acc1b3e32e9326799e29c4d5002ea851da09e846ac5
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://golowaki.ru/award?keyword=how+do+i+clean+my+power+pressure+cooker+xl PDF link annotation
    • https://poxovoxi.weebly.com/uploads/1/3/5/3/135398301/2571459.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468259/normal_5fcff49d08eba.pdfIn PDF document text
    • http://bukuminuwakub.mypressonline.com/radosipe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369912/normal_5fd21f411ba95.pdfIn PDF document text
    • https://rotalexabif.weebly.com/uploads/1/3/1/3/131381819/1ecdf8ab3b1a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404753/normal_5fdacf2281601.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470533/normal_603d99c5d4417.pdfIn PDF document text
    • https://jerolukemotib.weebly.com/uploads/1/3/0/8/130874115/pibiloremu_gusiloxajamo.pdfIn PDF document text
    • https://lefelovavuj.weebly.com/uploads/1/3/4/6/134644752/nofon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501963/normal_5fdeb29e58809.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424996/normal_5ff9082c4a807.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417222/normal_600be5ed65ba4.pdfIn PDF document text
    • https://nidukonijeso.weebly.com/uploads/1/3/1/3/131381088/bejamilagixutu.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/rerinago/cerere_inmatriculare_auto_gorj.pdfIn PDF document text
    • https://s3.amazonaws.com/xijilesuzuxo/66796555034.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/40783615429.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/revojelum.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/it_part_2_pennywise_true_form.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_off0000f17d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF17D 5508 bytes
SHA-256: f56cdef21013a5dbe4df0b9eb35b79fc2c5f67221312e8ee2ffd973d308f21c6
font_01_sfnt_off0001043a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1043A 10408 bytes
SHA-256: 2271015402f28d1abe5be1921bcbaf393ef376ddfef6f650fc9617707f6a62d4