Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae2f264e5ad479e8…

MALICIOUS

PDF

98.1 KB Created: 2021-04-04 20:54:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 2a5d25fee51b9b1f80ef3939965242f9 SHA-1: dae0d369981ddbfa4e2502868f45e41f755e6f02 SHA-256: ae2f264e5ad479e8d71bda55f7d98eea8928c29115f95227d62119fca5d9e459
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which are SEO-optimized and point to free download lures for various content, including textbooks and software. The primary URL, 'https://gimoguvi.ru/wix?keyword=marketing+an+introduction+13th+edition+pdf+download', is identified as a redirector for a free-download phishing scheme. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. The presence of numerous external links suggests an attempt to drive traffic to malicious or phishing sites, likely as part of a broader campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://gimoguvi.ru/wix?keyword=marketing+an+introduction+13th+edition+pdf+download PDF link annotation
    • http://zudezipebij.22web.org/plague_inc_apk_full_unlocked_no_mod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376101/normal_603d39a9dba41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484632/normal_60434e6973240.pdfIn PDF document text
    • http://zanibajawin.iblogger.org/rezoxosa.pdfIn PDF document text
    • https://wetugaremuzen.weebly.com/uploads/1/3/5/2/135298520/8385147.pdfIn PDF document text
    • http://ramosek.iblogger.org/daziloluba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413113/normal_5ff2409c43fcf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374956/normal_5fe20c628f76f.pdfIn PDF document text
    • https://wowajonaj.weebly.com/uploads/1/3/4/7/134717857/f4af0e81.pdfIn PDF document text
    • http://bewazin.iblogger.org/is_usafa_prestigious.pdfIn PDF document text
    • http://tipaxoj.66ghz.com/samojanakolemukon.pdfIn PDF document text
    • https://nolenefin.weebly.com/uploads/1/3/4/6/134629259/zebenisiki.pdfIn PDF document text
    • http://vifofumimugeke.22web.org/capacity_maths_worksheets.pdfIn PDF document text
    • https://bafexobis.weebly.com/uploads/1/3/4/0/134041027/4335906.pdfIn PDF document text
    • http://naxovonukile.iblogger.org/85581604800.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/dazutun/3591954474.pdfIn PDF document text
    • http://vejebuta.rf.gd/vuwukikojipisidugozimel.pdfIn PDF document text
    • http://bakenexiradofo.epizy.com/makobuxomunukefadif.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/whatsapp_gb_apk_free.pdfIn PDF document text
    • http://fakulolipokate.epizy.com/calendario_escolar_2020_nicaragua.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/28709050751.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/roludipojubezit.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/simple_past_tense_negative_form_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/bogakig.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/soweto_gospel_choir_songs_2019.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_off00013e0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E0E 5616 bytes
SHA-256: 6b3fb174fa5b5131b7338d49a384887ae232f17247d5da7dc7090458ff81ae62
font_01_sfnt_off00015157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15157 12272 bytes
SHA-256: 226f25e1a726a4ba3b0c6d9c98c3c1697a0ac559847955a79a6423293d0a2a04