Malicious PDF — malware analysis report

Static analysis result for SHA-256 16acd4aa2da8cb91…

MALICIOUS

PDF

69.9 KB Created: 2021-02-22 12:51:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 4016f7f661374f239e3875fb0cbbbfa3 SHA-1: 1ba832498d8e64fc6dfaa356da2fd9ccfa66f1a7 SHA-256: 16acd4aa2da8cb91d84721c20822c61cc019863b2b34e8bd717b5e4fd8df28d7
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://baarspo.ru/wix?keyword=bissell+lift+off+deep+cleaner+manual PDF link annotation
    • https://jisevudes.weebly.com/uploads/1/3/4/8/134882916/fc2cd200b6308.pdfIn PDF document text
    • http://myimperfectmomlife.com/vojilofomoxv0l8.pdfIn PDF document text
    • https://wivapitawipalex.weebly.com/uploads/1/3/2/6/132682528/840610.pdfIn PDF document text
    • https://paxixikepidak.weebly.com/uploads/1/3/4/6/134666626/5642448.pdfIn PDF document text
    • https://pesiwuveso.weebly.com/uploads/1/3/5/3/135392822/rajatov_mexebesubu_nufisoru_vudipikujusu.pdfIn PDF document text
    • http://hot-money.fun/602635171592t5tk.pdfIn PDF document text
    • https://tizitumobupo.weebly.com/uploads/1/3/4/9/134904485/2a3767.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369771/normal_60247ada18c31.pdfIn PDF document text
    • http://cocobeautybar.ca/photoshop_cs6_effect_tutorialaieam.pdfIn PDF document text
    • http://vorgazme.com/teoria_behaviorista_na_educao07pz6.pdfIn PDF document text
    • http://mon-cmbretagne.com/sejujefogaxa99sit.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/gotenukevepunin/professions_vocabulary_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/down_the_rabbit_hole_free_online.pdfIn PDF document text
    • http://piwuzodoxomox.epizy.com/41308400674.pdfIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/jofuvoledagiwilafidexoza.pdfIn PDF document text
    • http://gizugutopaf.epizy.com/rojabawiragiribazivepeg.pdfIn PDF document text
    • http://fevepapowiwed.epizy.com/reading_plus_answers_level_i_checkmate.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/flinnprep_ap_biology_answers_unit_11.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_off0000d3a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A3 5348 bytes
SHA-256: da8803f28fc109e61e548387fc899dcdeaf1419a37e6b49128ba10f3c72d9839
font_01_sfnt_off0000e5bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BF 11140 bytes
SHA-256: fe9b07fce6be4c9f6353437c0ad650ffba6ba0b2190cb5e798a1220d5bbaacbe