Malicious PDF — malware analysis report

Static analysis result for SHA-256 be70dce644c18045…

MALICIOUS

PDF

42.1 KB Created: 2020-10-10 11:43:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 8b286ce1f3f85c021589a81b6d1808e8 SHA-1: d52723be8d8f82d5fd33cfda27fd52155b219cc4 SHA-256: be70dce644c18045d43591dd5bc48fe717f931c41b9aba3d651bc27a7498b27a
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to suspicious domains and are flagged as malicious redirectors or part of a link farm. The document body, though obfuscated, includes a URL that appears to be part of a lure for apartment rentals, suggesting a phishing or scam attempt. The ML classifier strongly indicated maliciousness, and the presence of redirector links supports a malicious intent to lead users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/strik?keyword=new+london+nh+apartments+for+rent In PDF document text
    • http://files.senecaswissys.com/uploads/1/3/2/7/132740692/1718335.pdfIn PDF document text
    • http://files.bankfarmlleyn.co.uk/uploads/1/3/0/7/130776255/58a3f.pdfIn PDF document text
    • http://files.miriamruberlartist.com/uploads/1/3/1/4/131483019/828517e6fc26dc2.pdfIn PDF document text
    • http://files.fhaca.org/uploads/1/3/1/6/131606343/pidubozala.pdfIn PDF document text
    • http://revupudek.northvilletech.com/uploads/1/3/1/3/131397971/6145134.pdfIn PDF document text
    • http://xiwodi.senjistudios.net/uploads/1/3/1/4/131482916/kalozinuriweg.pdfIn PDF document text
    • http://files.morningfoxcoffee.com/uploads/1/3/0/9/130969761/7217635.pdfIn PDF document text
    • http://files.marlenemontoya.com/uploads/1/3/0/8/130813650/sotuxanusuwikanaji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/3838/4543/files/ludovoreka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9557/3158/files/expert_wrassling_unblocked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9641/7191/files/battle_cats_hacked_apk_ios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8188/2013/files/honeywell_thermostat_lr1620_wiring.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4169/2570/files/79609635743.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0978/8064/files/russell_westbrook_high_school_gpa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0665/6149/files/black_and_decker_max_lithium_flex_bdh2020fl.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9755/7654/files/16758342447.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5760/8864/files/36386231168.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_off000065fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65FA 5344 bytes
SHA-256: 7fdc4060efd690895b16b14e85b254a6b576ad7e91dcc9e071c59eec25d1c6c0
font_01_sfnt_off0000780e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x780E 10244 bytes
SHA-256: 54065198cd70764717b9736ff8b34284862afec59284c5c420c1a3faab0622ec

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