Malicious PDF — malware analysis report

Static analysis result for SHA-256 63c0c0d9d57cc720…

MALICIOUS

PDF

71.8 KB Created: 2021-02-22 08:41:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 018de98d65d50b1958834688ac59c3f5 SHA-1: d9fe6177733f688c8aaa991e7ff16225f44887af SHA-256: 63c0c0d9d57cc72081b9c60131e71a7267af6e3f578f9415c6b151da64f0a8df
156 Risk Score

Malware Insights

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

The PDF contains a link farm and an embedded URI that mimics a search result for a common technical query, suggesting a phishing or credential harvesting attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://maypoin.ru/wb?keyword=how%20to%20reset%20acer%20laptop%20bios%20password PDF link annotation
    • http://wusejopajaxus.22web.org/zarozujapalejakona.pdfIn PDF document text
    • http://lodobinu.iblogger.org/weekly_review_template_bullet_journal.pdfIn PDF document text
    • https://gijopufiri.weebly.com/uploads/1/3/1/3/131384250/e4cd337.pdfIn PDF document text
    • https://cdn.sqhk.co/nonagidux/4hcA4jp/answer_to_the_4_pictures_1_word.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/genijusemu/o_behaviorismo_de_watson.pdfIn PDF document text
    • https://s3.amazonaws.com/dazawojob/exploring_science_8f_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/wuxemegebif.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/brave_man_bait_2012_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/brightness_software_for_laptop.pdfIn PDF document text
    • http://jokokimalofov.rf.gd/android_auto_wireless_projection.pdfIn PDF document text
    • http://tokavasetalan.epizy.com/kabiguregafef.pdfIn PDF document text
    • http://bezegorev.epizy.com/how_to_connect_hp_deskjet_3050_to_internet.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/american_military_base_in_wiesbaden_germany.pdfIn PDF document text
    • http://mevomum.epizy.com/antivirus_for_pc_free_windows_10.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_off0000dc1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1C 5260 bytes
SHA-256: 192031a9f86b889513bbe4d830eab853195cd91ae6f7da3b2f298532fbe37395
font_01_sfnt_off0000ee12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE12 10520 bytes
SHA-256: b3ee3b71ba5bd099fa713ff420d1dfc9144d29ef4f43d1ef421708a4b90696ed

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