Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e5777d149bf5adb…

MALICIOUS

PDF

68.0 KB Created: 2021-02-22 09:26:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: e235a7072ed534768a4438956755dc33 SHA-1: 833a413bcf14c04f78103625c04296799ef8cf6b SHA-256: 7e5777d149bf5adbab6c75b461da31919e0cc2919764c40162327256abbc0741
254 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
  • 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://crophysi.ru/wix?keyword=apk+editor+download+apkpure In PDF document text
    • https://cdn-cms.f-static.net/uploads/4416811/normal_5fd2238824d00.pdfIn PDF document text
    • http://detarekowopowub.22web.org/11038034261.pdfIn PDF document text
    • http://purigoguwoz.22web.org/58380311424.pdfIn PDF document text
    • https://zukinubugepar.weebly.com/uploads/1/3/4/5/134514864/lasunekepa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388183/normal_5fd3a4cb9188b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fobonerenajob.epizy.com/android_bouncycastle_keystore.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/81106734866.pdfIn PDF document text
    • http://datonojafasaxup.rf.gd/75614284655.pdfIn PDF document text
    • http://fukefuxatolu.epizy.com/doofenshmirtz_evil_incorporated_jingle_sheet_music.pdfIn PDF document text
    • http://redaxuruzojogod.epizy.com/54883803125.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/the_omnipotence_paradox_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/appropriation_whitechapel_documents_of_contemporary_art.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/chunkz_malayalam_movie_free.pdfIn PDF document text
    • http://lozisuvuxinosog.epizy.com/68919038387.pdfIn PDF document text
    • http://fafuwite.epizy.com/b._a._n._k_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/lagnacha_biodata_format_in_marathi.pdfIn PDF document text
    • http://jefebewo.epizy.com/pokemon_fire_red_codebreaker_cheats_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/zasite.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/nokefusuvuzezivuxifovazi.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_off0000cf8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF8D 4920 bytes
SHA-256: 07f9977884c497ef7aa640150ca283484da729a63ddecb131c3f74a4511ef5c8
font_01_sfnt_off0000e068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE068 10084 bytes
SHA-256: 2d787513f98ae10a5945932be8226d56dd2ca0ddd059dfe6313aba3438546ddf