Malicious PDF — malware analysis report

Static analysis result for SHA-256 78dff9f66d9c082f…

MALICIOUS

PDF

79.0 KB Created: 2021-03-20 22:40:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 670aeb92583d8191a159f66ac93a3c90 SHA-1: a2cb86524b07b6aea4045c17ff5fbc57b169ef5d SHA-256: 78dff9f66d9c082f36833750cae29b848cb1c1e87e5a586b378241139ca9e878
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, indicative of a link farm or phishing campaign. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as a phishing trojan. The embedded URLs point to suspicious domains, likely serving as lures for users to download further malicious content or provide sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://lozipotod.ru/strik?utm_term=sony+str-dh720+problems PDF link annotation
    • http://drnextact.xyz/sc_dmv_formsoigbg.pdfIn PDF document text
    • https://ragixadimeruwu.weebly.com/uploads/1/3/4/8/134897014/bfc4f.pdfIn PDF document text
    • http://fasad-dom.site/aplikasi_convert_word_ke_freezuekr.pdfIn PDF document text
    • https://guvikaki.weebly.com/uploads/1/3/4/5/134519546/2536400.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446942/normal_600e6df3f09f2.pdfIn PDF document text
    • http://callipakk2.site/41620269008sipkh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453102/normal_601855799ff1d.pdfIn PDF document text
    • https://lijogidatu.weebly.com/uploads/1/3/2/3/132303170/pepuwinunelu.pdfIn PDF document text
    • http://temppicture.xyz/77419777396il0e2.pdfIn PDF document text
    • https://ruwizugaxuluba.weebly.com/uploads/1/3/4/7/134759804/poxugagiforixuvoko.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478947/normal_5fc612b124119.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366305/normal_5ff8d7c9db90a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470020/normal_5fd9172337a7c.pdfIn PDF document text
    • http://agencymedia-ig.com/who_is_the_strongest_yonko_commanderhtn5v.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/janodojivi/barcrest_mpu5_technical_service_manual.pdfIn PDF document text
    • http://palumigokaximeg.epizy.com/70688323262.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/fidiviwuvunolikizej.pdfIn PDF document text
    • http://zerujafulo.rf.gd/apa_template_for_literature_review.pdfIn PDF document text
    • http://dakawat.epizy.com/what_are_the_mean_median_and_mode_of_the_following_data_set.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/lakoluwoxumoxi.pdfIn PDF document text
    • http://vamudeb.epizy.com/5298831179.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/ronub.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/mini_pack_n_play_with_changing_table.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/kigexafonobum.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/25006591049.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_off0000f569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF569 5720 bytes
SHA-256: 1b6429944716403b2be3476fd5d335a1ecb6c6bda73a88b60968e8442bb0d7aa
font_01_sfnt_off000108c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C3 10872 bytes
SHA-256: 3969aeba6982d652c87b645f444655abd5d7987aa53c7fe38ee77b35b16f09d2

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