Malicious PDF — malware analysis report

Static analysis result for SHA-256 066764212833cbf6…

MALICIOUS

PDF

79.4 KB Created: 2021-03-23 00:59:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3ad71f335c6b85e6169b04cb40ab64b2 SHA-1: 15d7c80c391b12e0f188822cc77de707d8d06d09 SHA-256: 066764212833cbf6adda7db9ce2e5a6ef54e47471835ffa6bb8aa421d3be12d0
146 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://leonvi.ru/strik?utm_term=how+to+charge+mophie+juice+pack+air+iphone+7 PDF link annotation
    • http://tk-pobeda.site/1096036572004bek.pdfIn PDF document text
    • https://pofekivivefuron.weebly.com/uploads/1/3/5/3/135339802/0b3cb.pdfIn PDF document text
    • http://itrom.fun/50_shades_of_gray_book_excerpt7031j.pdfIn PDF document text
    • http://outputqwvk.space/how_to_use_weber_grill_propane_gaugeyouvx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389370/normal_5fe5ea6c13813.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454672/normal_6019c08753e38.pdfIn PDF document text
    • http://itverys.space/712812716663r88u.pdfIn PDF document text
    • https://madugonado.weebly.com/uploads/1/3/2/8/132815119/sedax.pdfIn PDF document text
    • http://interbankdigital.com/conference_oral_presentation_guidelinesqsfn1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378170/normal_602c33d165385.pdfIn PDF document text
    • http://all-host.site/kuvempu_university_bsc_chemistry_syllabusgptjv.pdfIn PDF document text
    • http://fortuneocredit.com/background_video_recorder_pro_apk_fulle7qp3.pdfIn PDF document text
    • https://durabikat.weebly.com/uploads/1/3/4/5/134512276/kawawimesivomov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369777/normal_5fd5f99b11a16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370275/normal_5fd0f8d4394b7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb4e5855-ceb3-469b-88cb-6e939c74cada/48942392259.pdfIn PDF document text
    • https://9e77dbea-16d6-438e-9859-4a68c5388828.filesusr.com/ugd/3225da_b5c469b9844a4d69b48e52dbdaff3d43.pdf?index=trueIn PDF document text
    • https://18bc7be3-897e-46c1-a475-efc190d089bd.filesusr.com/ugd/62845f_8ae962c629f645c5ab976ac084484fc7.pdf?index=trueIn PDF document text
    • https://24218389-b518-4ca3-8548-65eaf758daa4.filesusr.com/ugd/c836c3_578b773889bc4c98a500894d0cbb7828.pdf?index=trueIn PDF document text
    • https://a62e46b8-d933-4087-892c-e5439cec6991.filesusr.com/ugd/e9cba9_5543d382b3ea4ae7a698d67beb1d5030.pdf?index=trueIn PDF document text
    • https://74269c25-1731-4359-90d4-804f54ef9c1c.filesusr.com/ugd/b5973a_c0c3559082d34466b331d288ac8b320a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/eba149e7-5897-4619-b37d-2ab3f89eea17/husqvarna_rz4623_deck_belt_diagram.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_off0000f5b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B0 5408 bytes
SHA-256: e07f0295643d4c98cd0d2c7c15c5713a93ba32b9246230cf93536fadd24c97fc
font_01_sfnt_off0001080d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1080D 12216 bytes
SHA-256: fe361c450fa0f18eb175a3b953c9657284b1b52bcadcbc0d90a995211f3d3229