Malicious PDF — malware analysis report

Static analysis result for SHA-256 d82b7d2ff895309d…

MALICIOUS

PDF

82.2 KB Created: 2021-04-06 06:35:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 7a70683af75367925cf6a3c192d2cf76 SHA-1: 201d54492e9ff5f93dcb95cb14a9258ef05a6204 SHA-256: d82b7d2ff895309d714010ef113f377d1979355b6ecb01d22764e6111cb6fce8
206 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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) or Microsoft license-boilerplate 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://mezovuduw.ru/123?utm_term=bhagavad+gita+pdf+free PDF link annotation
    • https://cdn.sqhk.co/xijogedobu/jgoheFu/imdb_top_movies_online_watch.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393363/normal_605630343caa4.pdfIn PDF document text
    • https://cdn.sqhk.co/tesebere/jcBN3ic/warogerarogoromogil.pdfIn PDF document text
    • http://xiviwuk.iblogger.org/how_to_use_behringer_xenyx_x1204usb_mixer.pdfIn PDF document text
    • https://cdn.sqhk.co/zekuxemelop/hgMijyo/94798153231.pdfIn PDF document text
    • https://cdn.sqhk.co/sepokafaru/fhcgc6z/41022410195.pdfIn PDF document text
    • https://cdn.sqhk.co/wituruxa/gjjgXig/titefodedurib.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/jggcSih/funny_ringtones_download_baby.pdfIn PDF document text
    • http://bovizanaranofo.22web.org/sidesagodaximo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390660/normal_6052a9a307498.pdfIn PDF document text
    • https://cdn.sqhk.co/livefivepa/PjaB8ia/fimojafeni.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://vabuperupijod.epizy.com/33385748676.pdfIn PDF document text
    • http://natizuf.onlinewebshop.net/gozebamelaxopotalirud.pdfIn PDF document text
    • https://2aa0b900-127f-4603-a19a-6a731d3c9eb1.filesusr.com/ugd/5eaffa_22853a10a6f64177962d365da880ac58.pdf?index=trueIn PDF document text
    • http://zesaxuxi.rf.gd/nekoropujesilodelogarebew.pdfIn PDF document text
    • https://a5a8f6e1-24ae-425c-880d-6f4079e3c376.filesusr.com/ugd/035627_5b5001b96b4d4099b9e7003f5801baf2.pdf?index=trueIn 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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC5 5204 bytes
SHA-256: d1de5a30ea047456f13ef895f89e346c6cb557491aaac5ed32d5bfa9f039ed8c
font_01_sfnt_off0000ef80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF80 3740 bytes
SHA-256: 814992be763021c11dca23fed22b8bb7a0f9688c8b5af2f3d58b36f318d7b63c
font_02_sfnt_off0000fafa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFA 12512 bytes
SHA-256: 3b9cbe0da3163c5726c10048f71e3d685c18abc192a9ff1fb192ddbcde909e03
font_03_sfnt_off00012398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12398 7144 bytes
SHA-256: abe8761f4b8956e158e407982d88efbeacb6ee3c7a96cce4f336526700dff0f9