Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fe7ec072844eda9…

MALICIOUS

PDF

55.7 KB Created: 2020-08-12 06:29:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 036f3bc83d79c121b45af6794dc89a1b SHA-1: 83afc68b3a23fafcc38673769d08e26f20f80282 SHA-256: 0fe7ec072844eda98f3d7563243723e4f5d4c25895059446c88a6cac5ec01112
162 Risk Score

Malware Insights

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

The PDF contains numerous links, with one identified as a malicious redirector. The document body, though partially corrupted, suggests a lure for a 'tutorial solidworks 2016 pdf bahasa indonesia'. The presence of a link farm and a malicious redirector indicates an attempt to lead users to potentially harmful content, likely for phishing or malware distribution. No scripts were extracted, but the overall structure and link analysis point to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ttraff.cc/wb?keyword=tutorial%20solidworks%202016%20pdf%20bahasa%20indonesia
    • http://xigep.piperdavisbaseball.org/uploads/1/3/2/6/132695663/molomafejavopapev.pdf
    • http://dekeze.surreybulldogs.com/uploads/1/3/0/7/130775129/8247258.pdf
    • http://files.wendyhodder.co.nz/uploads/1/3/1/4/131407424/pezesisewikejimosuf.pdf
    • http://files.gulfislands.ca/uploads/1/3/1/4/131483009/8077073.pdf
    • http://tejazo.maddumplings.com/uploads/1/3/1/4/131453870/d204cba5f4e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0439/3179/5624/files/botudalomidule.pdf
    • https://cdn.shopify.com/s/files/1/0435/8651/9208/files/xevilotizaxotudujenebug.pdf
    • https://cdn.shopify.com/s/files/1/0434/2225/3208/files/modern_arboriculture.pdf
    • https://cdn.shopify.com/s/files/1/0432/2331/8686/files/ditonilikakadatunow.pdf
    • https://cdn.shopify.com/s/files/1/0440/0922/6398/files/9678371090.pdf
    • https://cdn.shopify.com/s/files/1/0430/9218/1145/files/sekuzozagovetesizanulapax.pdf
    • https://cdn.shopify.com/s/files/1/0431/0210/9856/files/ritera.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3097/files/nelabagemivi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3765/4178/files/criminal_law_amendment_act_2020_bare_act.pdf
    • https://cdn.shopify.com/s/files/1/0438/4319/0944/files/antifungal_susceptibility_testing.pdf
    • https://cdn.shopify.com/s/files/1/0432/1217/7572/files/97442072986.pdf
    • https://cdn.shopify.com/s/files/1/0430/8900/2645/files/20113484639.pdf
    • https://cdn.shopify.com/s/files/1/0439/2484/8795/files/lufigowi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000809b.bin
ba33b49bc4da694d49d3bdf490a573e962376be33395102a3bafbfd364ed7579		 pdf-font-stream PDF embedded font (sfnt) at offset 0x809B 5736 bytes
font_01_sfnt_off0000941a.bin
12a80561fac897ce53a283de50faad586ecbf5e8d3970b6460ba75a3b0966a5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x941A 2164 bytes
font_02_sfnt_off00009d70.bin
97e211f7b045ece7a1e7d7d9da2bd9289faf20147ea1f89f7f10029f1556de37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D70 10992 bytes
font_03_sfnt_off0000c31a.bin
ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC31A 4324 bytes

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