Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9b56672428b0b60…

MALICIOUS

PDF

89.0 KB Created: 2021-03-20 22:42:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e2d82809d11a25b309904210f149470b SHA-1: 49153e08e64f78b0e9a4fa5e036b42fae4162b24 SHA-256: a9b56672428b0b60e332e73093beca94b230eed045c6986af05c30b30cc24429
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of an SEO link farm designed to redirect users. The primary redirector URL, 'https://zajinet.ru/wix?keyword=skyrim+konahrik%2527s+accoutrements', is presented as a lure for game-related content. This pattern is indicative of a phishing or scam campaign aiming to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://zajinet.ru/wix?keyword=skyrim+konahrik%2527s+accoutrements PDF link annotation
    • https://sufupixugopibo.weebly.com/uploads/1/3/5/3/135316623/nijelusikusuvikowava.pdfIn PDF document text
    • http://kutatit.getenjoyment.net/what_powers_does_a_guardian_have.pdfIn PDF document text
    • https://padudarudiloga.weebly.com/uploads/1/3/4/7/134714427/4544844.pdfIn PDF document text
    • https://jixivegeparimes.weebly.com/uploads/1/3/4/7/134749144/mumitufamuzido_wezivoguwefisu_belelo.pdfIn PDF document text
    • http://fiwetud.scienceontheweb.net/papeletepa.pdfIn PDF document text
    • http://skout.tech/577333911357edxt.pdfIn PDF document text
    • https://kapovisawok.weebly.com/uploads/1/3/4/6/134652754/3678475.pdfIn PDF document text
    • http://digitaltoolsfor.xyz/numerology_books_in_englishu738z.pdfIn PDF document text
    • http://giwitap.getenjoyment.net/62939853234.pdfIn PDF document text
    • http://serviceforyou.site/jodha_akbar_serial_hd_video_songwf46d.pdfIn PDF document text
    • https://savozajit.weebly.com/uploads/1/3/5/3/135320594/rezofab.pdfIn PDF document text
    • http://mivegik.mygamesonline.org/pevilok.pdfIn PDF document text
    • http://zikevamakag.mygamesonline.org/how_to_program_a_samsung_remote_ak59.pdfIn PDF document text
    • http://bapulesaj.mygamesonline.org/1924891176.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pojoviraxerojo.myartsonline.com/infinim_tone_price.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/what_makes_a_good_man_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/scan_software_brother_mfc_490cw.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/commercial_leasing_agent_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/the_arabian_nights_bangla.pdfIn PDF document text
    • http://jimarol.myartsonline.com/43597620076.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/47090465072.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/order_of_operations_worksheets_with_no_exponents.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/videoder_old_version.pdfIn PDF document text
    • http://faxiruvud.myartsonline.com/chick_fil_a_chicken_salad_sandwich_nutrition.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/anfibios_venenosos.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/zoduko.pdfIn PDF document text
    • http://soranodabiwegi.myartsonline.com/96799707816.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001096d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1096D 5308 bytes
SHA-256: 179823991a2e523cd6bc66eeda3139a08d3fa5fde87e203db279bf4577ec486f
font_01_sfnt_off00011b60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B60 10772 bytes
SHA-256: 2b8e627595fd37da15b9979adb7f87f9c24e60923bf4b64420d8ff1879740877
font_02_sfnt_off0001404f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1404F 16144 bytes
SHA-256: 64d7204b7c904b600158d10e0b8dfc2ac39b7db43a904f501a21ebbf7969b576

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