Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceacd418c9b48048…

MALICIOUS

PDF

73.6 KB Created: 2021-04-04 16:17:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6a21887bdff6f9579886e6fb4824aeed SHA-1: 8550a61cc0df59b7156d1608c2bf551982fd8165 SHA-256: ceacd418c9b48048b04fa29cfc21d150b0ca9bd12e8acc232557a09e3f5b8ca5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wix?keyword=uta+hagen+questions+pdf PDF link annotation
    • https://vabeliguteziji.weebly.com/uploads/1/3/1/3/131379360/koxuk.pdfIn PDF document text
    • https://gekafokolasiga.weebly.com/uploads/1/3/1/3/131384301/xajovukesuredozabotu.pdfIn PDF document text
    • https://takadoturig.weebly.com/uploads/1/3/4/1/134108809/8147143.pdfIn PDF document text
    • http://xepuxupipe.mywebcommunity.org/xedilogaranirida.pdfIn PDF document text
    • http://jotitojimo.mygamesonline.org/akreditasi_puskesmas_bab_6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459777/normal_5fd74701c79a6.pdfIn PDF document text
    • http://lazategomid.scienceontheweb.net/fotiwas.pdfIn PDF document text
    • https://cdn.sqhk.co/kasesiseb/snrHhge/falibizonatujiwanam.pdfIn PDF document text
    • https://cdn.sqhk.co/kafodarifab/gge5ahT/zumamuwujisiburap.pdfIn PDF document text
    • https://pipabujul.weebly.com/uploads/1/3/2/6/132680817/diliwagesanu-pizamipizo.pdfIn PDF document text
    • https://cdn.sqhk.co/jabupexipa/jhegdhe/zusakazusejuvugo.pdfIn PDF document text
    • http://vomamafawib.scienceontheweb.net/22672246216.pdfIn PDF document text
    • https://cdn.sqhk.co/larovejadeb/jjb5idZ/babemerivubusotijorifafon.pdfIn PDF document text
    • https://cdn.sqhk.co/gegenosuzun/HIYjcWb/commander_in_chief_lyrics_from_demi_lovato.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426558/normal_604b396fdb379.pdfIn PDF document text
    • https://cdn.sqhk.co/fixuzigetir/jjbjahe/bojipoposizixuga.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bf1950e-ee6d-4697-b7ab-6e108adcf465/34656517702.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd17cf3a-2118-4704-b8af-4b16c037a738/marshall_mg100hdfx_head_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1932ed60-b4d7-4d98-bb52-6928f087a204/9395277698.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87b3f743-bc3a-4438-a4ba-6e5839a04d45/belipi.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_off0000e550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE550 5292 bytes
SHA-256: 1301b241097d98b7f594c3a14f82e4ad733bdbafd2aea3359e314e0d4a84f365
font_01_sfnt_off0000f750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF750 10028 bytes
SHA-256: 9ed9ac4bacff83c1956fda2b44051277b8d66001e17ce7b9754917fc23749f36

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