Malicious PDF — malware analysis report

Static analysis result for SHA-256 78a647ad9e9fa6b6…

MALICIOUS

PDF

86.1 KB Created: 2021-05-22 02:48:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b8c9bcd88a9b4fde8509741c60e6835a SHA-1: d984e4bf63db3a798f863a7d94575be9e9943aa2 SHA-256: 78a647ad9e9fa6b6c90c448e5e4f952a79e37a801057d3d863922d55a70add2a
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 0.9998

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 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://mezovuduw.ru/strik?utm_term=manual+de+carre%25C3%25B1o+libro+completo PDF link annotation
    • https://mojoranazo.weebly.com/uploads/1/3/4/4/134403481/xedevuvugon.pdfIn PDF document text
    • https://wuvirinofibugiz.weebly.com/uploads/1/3/1/0/131070402/7edbd48c8a06f3.pdfIn PDF document text
    • https://lodipopigib.weebly.com/uploads/1/3/1/8/131857338/5773145.pdfIn PDF document text
    • https://wojujasomiselok.weebly.com/uploads/1/3/4/4/134487215/zudolebepuvigax.pdfIn PDF document text
    • https://lipanoragufa.weebly.com/uploads/1/3/4/4/134489679/xuvadiwisogor.pdfIn PDF document text
    • https://wuluvaxezipow.weebly.com/uploads/1/3/5/3/135393263/mixajiwigof-mapugi.pdfIn PDF document text
    • https://vuterezupip.weebly.com/uploads/1/3/1/3/131380942/5482542.pdfIn PDF document text
    • https://zewogamiwivu.weebly.com/uploads/1/3/4/3/134313422/zoludisitemudebitom.pdfIn PDF document text
    • https://wakowugiluto.weebly.com/uploads/1/3/5/4/135401031/a6676f81ac1268.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/10fe2ed6-18be-4cb9-a60b-fd2ac1412e40/69505497197.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f603f7fd-552a-4e2e-8830-80a886f5f424/24523873637.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/29353732097.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/who_to_call_to_fix_a_washing_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/safupawuraku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e85bb6d6-ab9f-4384-be24-6747492de342/what_are_metric_system_measurements.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c3636bd-a884-4533-ad2a-68f2e0cb3f13/what_are_basic_emotions_in_psychology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81b7157b-af0c-4917-aed2-9a4420bfde91/dapiwesamozuzide.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/cd_albums_free_online.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/50349244084.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a8d4155-6e10-45c8-8aa4-f28055581599/hp_7610_printhead_price.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_off0001121b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1121B 5396 bytes
SHA-256: 729fe40cf485d0cc5df73356ecc6b7277af1562730dee57beaaaf6773a4aa7ce
font_01_sfnt_off0001241c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1241C 12232 bytes
SHA-256: 7c1b13839a3d789d8c2fc007a8417cb6d649e4ad047760b806c3a33a4c7c9e55

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