Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfec0c5d6f1ab4bd…

MALICIOUS

PDF

78.7 KB Created: 2021-02-15 11:01:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: a63c13d6f0eb19098efffe9f215d2607 SHA-1: 313509fa5079ff17e4e14823f1feba9afddced0f SHA-256: cfec0c5d6f1ab4bdaca2bf733ae1ed2e1dee06ae65875bdfaede9b3a00cfe792
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://jottigo.ru/123?utm_term=reading+tips+for+struggling+readers PDF link annotation
    • http://pokemonrivals.online/777139352440j1f1.pdfIn PDF document text
    • https://biweworu.weebly.com/uploads/1/3/4/5/134525234/7192508.pdfIn PDF document text
    • https://tedisizizifem.weebly.com/uploads/1/3/4/2/134235801/77f3efecfcaca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378608/normal_601f996ecebc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366325/normal_600c421b49ebe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477886/normal_602123922b737.pdfIn PDF document text
    • https://gokepitamewema.weebly.com/uploads/1/3/5/3/135325242/9a09c4b38eb558.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445531/normal_5ffc122d8bed2.pdfIn PDF document text
    • https://rigegafotu.weebly.com/uploads/1/3/0/7/130740045/xosarusowavojugidu.pdfIn PDF document text
    • https://linabodaku.weebly.com/uploads/1/3/1/1/131164293/gidexojujujumubu.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/tedowafomaru/malwarebytes_anti-_malware_free_new_version.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/bandslam_full_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/vekikazegi.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/android_tv_vs_smart_tv_india.pdfIn PDF document text
    • http://demuremapinob.epizy.com/bhojpuri_video_gana_2019_hd.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_off0000f81f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81F 5216 bytes
SHA-256: 307669a052c65d6eee56837cfb2ff3989d0f2a4025d2d7ca39c5fe75b06427e7
font_01_sfnt_off000109f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F6 10520 bytes
SHA-256: cc54d851885f380ac30994d0d9bf959501c06de2bd0ff79a3ca394183b4267c1