Malicious PDF — malware analysis report

Static analysis result for SHA-256 c662cb692a945fad…

MALICIOUS

PDF

68.5 KB Created: 2021-03-15 02:49:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9090816b356440bd22163e1dc5d94a18 SHA-1: 9c54bdc6da0d783bf720df47cf62c04b42bd33de SHA-256: c662cb692a945fada0dcf7d718b0edf8b15a8996bf7082ef46344c3169f76622
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a large number of external links, many of which are likely part of a link farm designed to obscure the malicious destination. The primary IOC is the URL `https://jottigo.ru/wix?keyword=scag+owners+manual`, which is presented as a "Scag owners manual" to lure victims. No scripts were extracted, but the PDF structure and numerous external links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/wix?keyword=scag+owners+manual PDF link annotation
    • https://lapaluletegole.weebly.com/uploads/1/3/4/6/134679291/wagadojavan-podujiwuxopuke-xapegesuget.pdfIn PDF document text
    • https://tizelizenofus.weebly.com/uploads/1/3/0/7/130740364/9b792.pdfIn PDF document text
    • https://cdn.sqhk.co/wokinuge/rYLThba/xulenijexulov.pdfIn PDF document text
    • https://juposuwidamad.weebly.com/uploads/1/3/1/4/131406248/wazanawokuxu_kiridejapum.pdfIn PDF document text
    • https://cdn.sqhk.co/gitesafuwu/WidMtjf/pugak.pdfIn PDF document text
    • https://cdn.sqhk.co/noneniwetav/ijJMpa1/online_marketing_certificate_canada.pdfIn PDF document text
    • https://cdn.sqhk.co/vibifexode/bFjbgiv/today_s_date_in_roman_numerals_uk.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/mukut/murmur_of_the_heart_full_film.pdfIn PDF document text
    • https://s3.amazonaws.com/dikomavomem/how_to_connect_a_bluetooth_soundbar_to_a_vizio_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/wizomoravazub/dixuzuzu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b96ea94-10dc-4fe7-9bc7-1f2ee9aeb87a/zesinodakukax.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/amplitude_waveform_graph.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49d6f07e-6ea1-4443-bc67-f39371edb1c7/que_es_los_primeros_auxilios.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/13512015578.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/android_tv_software_update.pdfIn PDF document text
    • https://s3.amazonaws.com/musokejixami/54613794669.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c24f425e-3cc0-4439-bb48-9a99bed8bc79/microsoft_word_2010_table_of_contents_formatting.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/resumo_da_historia_do_dinheiro_no_brasil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41503ca7-7552-47ae-9d41-31abd6727bd0/mesalatemufifezavuzuza.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/nudosugunafo.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_off0000cf78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF78 5316 bytes
SHA-256: 93738243355ab7e1ec2c1d55d782b0c2d157ec290b5cf25d0d7d183d1c7acc56
font_01_sfnt_off0000e187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE187 10336 bytes
SHA-256: a0cc0bd28ad8965d4fc56fc95113c0c111fa3955b4a61ceda44e880f6f7356b4

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