Malicious PDF — malware analysis report

Static analysis result for SHA-256 062ba54967fa7032…

MALICIOUS

PDF

78.2 KB Created: 2021-03-03 10:21:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b2ff21cf19ba569878e4be3830322005 SHA-1: 528802219e6afd3af5151c811bf9e246d67466a2 SHA-256: 062ba54967fa7032b42ce0185d1ee204ff96b0ca93d6b318b69b68ce7b87c8b5
156 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 likely part of a link farm designed to distribute malicious content or phishing lures. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The document body, though partially corrupted, references 'Samsung galaxy tab a sm-t350 screen replacement', suggesting a lure to attract users interested in such topics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/123?utm_term=samsung+galaxy+tab+a+sm-t350+screen+replacement
    • https://cdn.sqhk.co/zidenesek/ji3jchi/the_amazing_adventures_of_gumball_darwin_and_sarah.pdf
    • https://cdn.sqhk.co/jisanipu/ihjahhn/candy_crush_friends_saga_characters.pdf
    • https://ripaduwik.weebly.com/uploads/1/3/5/3/135311581/patonikala_terika_keworupewomop_tuperutezugode.pdf
    • https://cdn.sqhk.co/wokiwife/iIvLjaw/41975951323.pdf
    • https://pogudemuzam.weebly.com/uploads/1/3/4/0/134018755/5689132.pdf
    • https://cdn.sqhk.co/ribafesupuro/ggUhjgh/41526662133.pdf
    • https://cdn.sqhk.co/zejejofe/ghRFWgj/gupegaraxanupivul.pdf
    • https://zodefamebatum.weebly.com/uploads/1/3/5/9/135967531/jewizusuzabawo_sukijamusogutil_sefokujadumi_besetinepogi.pdf
    • https://vopuxobud.weebly.com/uploads/1/3/5/9/135974080/18f531df15d9.pdf
    • http://sofarabexuki.iblogger.org/fezarotazimibel.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://foxebunuref.epizy.com/how_to_cope_with_knee_pain_at_night.pdf
    • https://s3.amazonaws.com/tevigotu/lidilakiwanezoxid.pdf
    • http://mejojaka.epizy.com/18217109600.pdf
    • https://s3.amazonaws.com/fatikonavori/tubemo.pdf
    • https://s3.amazonaws.com/lebaxa/acep_choosing_wisely_guidelines.pdf
    • http://demuwesax.epizy.com/4964510680.pdf
    • http://raduniti.epizy.com/puvuzopimixinixidezef.pdf
    • http://zudavowopo.epizy.com/32063881916.pdf
    • http://sukivuserofa.epizy.com/dopagixalorokofubij.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f261.bin
fa091878249238b6332a9c498548303dad3aa47689f2b0b8f1ef7d71278461fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF261 6128 bytes
font_01_sfnt_off00010734.bin
a0828ae6533ec48fb65eb25e86e4b43bd507a75c7ab69080a8593df58d708824		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10734 10520 bytes

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