Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad858ba7f103a0db…

MALICIOUS

PDF

38.9 KB Created: 2020-10-06 13:51:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 3c2f3141d2685570146dbe245167cacf SHA-1: 1098953c1af436a663cfcd970ce37c28fcd05a6b SHA-256: ad858ba7f103a0db9a3172f45a1fef85514f5b45e4174477dce5e11a0ac33ec2
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/strik?keyword=appareo+stratus+esg+installation+manual In PDF document text
    • http://fovovin.shopeccentricity.com/uploads/1/3/1/3/131378942/acc85b15622fe8.pdfIn PDF document text
    • http://files.apexbait.com/uploads/1/3/1/4/131405956/4878675.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/4945/1161/files/molecular_biology_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/3698/3720/files/takodijavajupideromafu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4798/8631/files/zuzibidunodevifexixezodod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/2200/2587/files/birapunotexo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4660/8794/files/lagurodivelop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/7687/9271/files/31967408988.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9300/2902/files/college_survival_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8042/3326/files/assef_kite_runner_character_analysis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5856/0661/files/ejercicios_biblicos_adventistas_en_power_point.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8570/2054/files/bebupos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9072/2454/files/huron_city_schools_calendar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6195/9061/files/linemapikob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4824/1818/files/82583995546.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
🗂 Part of campaign: apexbait.com 3 samples

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B71 5128 bytes
SHA-256: 1024bbebbcc6e87843bc1d26a62bc8f58b20e637505ed470567aa2407fd2d4f5
font_01_sfnt_off00006ccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CCD 9824 bytes
SHA-256: 90cf62ddcbd645041de345b776eb324a45d69ab8677aaec1317b807b7a430b18

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