Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc5f15347fd6fee6…

MALICIOUS

PDF

71.3 KB Created: 2021-01-20 13:04:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: c5150c8f641d64025e9f1186c6003ef8 SHA-1: 0e40a37d78e5ceead46633265aae82b1a3dc0937 SHA-256: cc5f15347fd6fee64274075428796af54f25c36331d4547c8e70a7d5b6fff50a
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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://maypoin.ru/aws?utm_term=mi+store+app++latest+version PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4500679/normal_5faf464369004.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485818/normal_5fd0e616a58d2.pdfIn PDF document text
    • https://buwuwewofopalun.weebly.com/uploads/1/3/4/0/134097592/fuberixidi.pdfIn PDF document text
    • https://rexaririwe.weebly.com/uploads/1/3/1/6/131637114/gazudifufipinuluw.pdfIn PDF document text
    • https://xinofebew.weebly.com/uploads/1/3/5/3/135305957/mewisivedalave-vupenuz-zisapemaner-gigovigoke.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxodokoju/jgcghhi/wubimipoxizusaribumuti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408984/normal_5f95c029cf959.pdfIn PDF document text
    • https://cdn.sqhk.co/goworonol/gQlhcie/lineage_2_revolution_vietnam_forum.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/gekixadonuru/good_night_sad_shayari_image.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/cluster_headaches_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/chillar_party_movie_1080p.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/fimiv.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/bayer_leverkusen_fifa_19_career_mode_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/buddhism_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/rogolunul.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_off0000dadc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDADC 4880 bytes
SHA-256: 9271df07f117d2aea3768d5c5ccc052c21a1173261d7bccda316ced0bc2a399a
font_01_sfnt_off0000eb90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB90 10776 bytes
SHA-256: 281d46f2c66eb3d03b2d325cca8196e517e6a2b9fd2500cd9f09deba4d4c27f3