Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e16693730bd4a92…

MALICIOUS

PDF

83.7 KB Created: 2021-03-21 00:47:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b4547ed29d78110832d92212baa8f07d SHA-1: 2317e2491e154315ad025e478c781ea25d0119ce SHA-256: 7e16693730bd4a92d2a9c3282c5d093595e79eddcb300cf9aa05af9d7f38e769
206 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 7

  • 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.
  • 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://golowaki.ru/strik?utm_term=twilight+breaking+dawn+part+2+final+song PDF link annotation
    • http://betijeduw.getenjoyment.net/que_beneficios_tiene_la_educacion_fisica_en_el_cuerpo_humano.pdfIn PDF document text
    • https://litisowof.weebly.com/uploads/1/3/4/6/134692954/ce21aaf9c572.pdfIn PDF document text
    • http://arendaavto.taxi/saeco_automatic_espresso_machine_sale4u7w6.pdfIn PDF document text
    • http://kefudepoduwudi.sportsontheweb.net/tagayun_building_design_and_construction.pdfIn PDF document text
    • https://satalediveli.weebly.com/uploads/1/3/4/0/134018026/netedulixuvi.pdfIn PDF document text
    • http://testertumentum.space/31088438569t720v.pdfIn PDF document text
    • https://tumenunomowet.weebly.com/uploads/1/3/0/7/130775025/vomoseg.pdfIn PDF document text
    • https://kipigifusulip.weebly.com/uploads/1/3/4/4/134437712/nadejijapabapapebope.pdfIn PDF document text
    • https://garepogive.weebly.com/uploads/1/3/4/8/134871831/2055100.pdfIn PDF document text
    • http://tupaxeguna.scienceontheweb.net/how_to_find_all_gmail_account_by_phone_number.pdfIn PDF document text
    • https://wugovaxovagebi.weebly.com/uploads/1/3/0/9/130969592/poputimoreg.pdfIn PDF document text
    • https://saboruxeketeg.weebly.com/uploads/1/3/4/8/134850947/digis.pdfIn PDF document text
    • http://tadurarawi.mypressonline.com/1343620958.pdfIn PDF document text
    • https://lawuzifelive.weebly.com/uploads/1/3/4/0/134041442/0bdbc4176778.pdfIn PDF document text
    • https://wajifisawebe.weebly.com/uploads/1/3/4/4/134480175/b1c61a67.pdfIn PDF document text
    • http://sevastopol.sale/tolijenufopujorijfgjrs.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/b1fa0a11-3bf5-41dc-89c1-480a1f873138/kobitefirevibudaken.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce2cc5f8-2928-450a-907b-0c9f249d3aba/79634916586.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b550b828-f3d2-45db-95a2-d17fd1f47dd7/sig_p226_legion_40_cal_review.pdfIn PDF document text
    • http://madigekole.onlinewebshop.net/burivuxosebukifan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c093fb2-fc99-421b-bda8-cf0fca5d80c9/64683807306.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e47640f3-7225-4d2a-93e7-29595233674e/hp_laserjet_4200_roller_kit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cebd1c7-2d0f-4609-9d67-5f12b8422790/behringer_xenyx_302usb_mixer_review.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_off00010703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10703 5680 bytes
SHA-256: 226729b0cf28725affc274b8960c03b7f35e69cb30260fdaf8ba0465f805e524
font_01_sfnt_off00011a5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A5B 11156 bytes
SHA-256: 8c48a7dc7dfa4160317115decddb3364ab606101f53b3a219736b92f8d9e941b