Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb312a3f4fcdd62d…

MALICIOUS

PDF

92.3 KB Created: 2021-03-15 13:20:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 63325612e2028f097628ff42b02c6362 SHA-1: d9703c33b06ed8c07b896fa2ea42b688bcc26f97 SHA-256: fb312a3f4fcdd62dff43d0bdbbb35a61ea08eef5eec6afe2b4919a4e292e6ba5
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many of which are to PDF files, suggesting a link farm or SEO poisoning attempt. The primary URL, 'https://resalured.ru/strik?utm_term=why+does+my+ip+camera+keep+going+offline', is likely used to redirect users to a malicious site for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://resalured.ru/strik?utm_term=why+does+my+ip+camera+keep+going+offline PDF link annotation
    • https://cdn.sqhk.co/nozedimasav/dhjgigc/to_the_moon_phora_sample.pdfIn PDF document text
    • https://cdn.sqhk.co/wolitobutak/gjgjhg7/war_of_ottoman_empire.pdfIn PDF document text
    • https://nobujudiwid.weebly.com/uploads/1/3/1/4/131452838/nuzosigora_nulubemigepi_likapej_zijujevur.pdfIn PDF document text
    • https://faniruwesil.weebly.com/uploads/1/3/5/9/135993686/goxafogojavisurela.pdfIn PDF document text
    • https://cdn.sqhk.co/zasokolof/ICghght/69289402725.pdfIn PDF document text
    • https://cdn.sqhk.co/wefadegese/VM5hdgi/hilo_fun_lite_camper.pdfIn PDF document text
    • https://cdn.sqhk.co/nesuxozajek/cFgdwoB/vukuxupowimoxejuwe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/figidireki/boruto_episode_guide_wikia.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/answer_chinese_song_tik_tok.pdfIn PDF document text
    • https://s3.amazonaws.com/furunumaroxun/ultimate_comics_spider-man_kim_jest_miles_morales.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/99528336772.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/calendario_2018_mensile_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/sobaketemu/dutetimituxadosilewugol.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxefemebidaz/understanding_public_policy_14th_edition_free.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/python_programming_language_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/91361225915.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/operatoria_dental_barrancos_money.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCD 6744 bytes
SHA-256: b29f9350a720d2da9dc50567d08c4a82684db1fcb28a47e3a5788345b392d808
font_01_sfnt_off0000fdb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB2 5456 bytes
SHA-256: d7ba0ea6d1d159c407803a80ab0328ac7b088f8a71fb38de0c3f469d7e3d1a38
font_02_sfnt_off00011019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11019 2368 bytes
SHA-256: 4d46cc61ad422feffef31f7743c1c1ff5ed151f699562a5e9c8fabd0507ea62d
font_03_sfnt_off00011a8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A8C 10848 bytes
SHA-256: 3c6808dd2d7f113463d7e8965538a8e6643b09d28e73c3cc178b73d1d047fb3e
font_04_sfnt_off00013fd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FD1 16036 bytes
SHA-256: 52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550
font_05_sfnt_off00015439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15439 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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