Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4c21e5890a6426b…

MALICIOUS

PDF

65.5 KB Created: 2021-02-24 06:35:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 338a9c95411350075f8fbf3e47c995e6 SHA-1: 48e79a63dd76758890080aec0c64a82c4fed59a1 SHA-256: c4c21e5890a6426b6387f3dfb384ea4495d2b783296c0ef652e11442d86f2e87
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://bologen.ru/123?utm_term=why+is+the+red+light+flashing+on+my+uniden+phone PDF link annotation
    • https://xaporavuxeboj.weebly.com/uploads/1/3/2/6/132695407/7c6ff10644.pdfIn PDF document text
    • https://cdn.sqhk.co/goronikel/vAhjsgh/the_wild_darkness_ruins_of_light.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368952/normal_60143b047ba66.pdfIn PDF document text
    • https://cdn.sqhk.co/solumapidema/Phflc1m/light_up_beer_pong_table_spencers.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxosutuku/ezNKie8/flow_free_download_windows_10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421943/normal_5fd09e4a10b88.pdfIn PDF document text
    • https://vomuzubedabop.weebly.com/uploads/1/3/0/9/130969103/3b756915f3b6fe.pdfIn PDF document text
    • https://jilukixewe.weebly.com/uploads/1/3/4/0/134042659/figifozovazalov-futulavum-luvif.pdfIn PDF document text
    • https://wivupenoremew.weebly.com/uploads/1/3/0/7/130775018/1972041.pdfIn PDF document text
    • https://cdn.sqhk.co/bataseset/aqOgfij/zombie_shooter_game_download_apk.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/tawovojo/answer_key_mpsc_clerk_typist_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/sajona.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/neuropathic_arthropathy_deformity_icd_10.pdfIn PDF document text
    • https://s3.amazonaws.com/befafuni/baricco_libri.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/nitij.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_off0000c202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC202 5568 bytes
SHA-256: 62c70cf8d122f52f8211a592a542025bba1069722bf5800fe4e57fbe58109a83
font_01_sfnt_off0000d4e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E1 10652 bytes
SHA-256: b37e722de47125ccf93387668e8d3bd7f5999eff4edc4a48582a901a3aff1a50