Malicious PDF — malware analysis report

Static analysis result for SHA-256 6830cd7831018c7c…

MALICIOUS

PDF

42.3 KB Created: 2020-08-05 05:41:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82caa6352ba81ea841c6d36e5baccabb SHA-1: 3b95ee28fdadd54195468cc985c537d91a40aeb6 SHA-256: 6830cd7831018c7c411d0bf3eba0ab54fbf41c4069f3e2f0ad8ca5080d9a7bd1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external resources, and one specific URL is identified as a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure related to job applications, suggesting a phishing attempt. The presence of a malicious redirector indicates an attempt to lead the user to a compromised or malicious site.

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://ttraff.ru/pify?keyword=cpns+bengkulu+tengah+2020+pdf
    • http://files.sound-revolutions.com/uploads/1/3/2/6/132682681/vogujafedop-zunaxazuwa.pdf
    • http://vorazebu.manateeconcertband.org/uploads/1/3/2/8/132814930/datiwumisaza.pdf
    • http://files.mkefacepaint.com/uploads/1/3/0/8/130814085/giradu.pdf
    • http://files.ics-soilseal.com/uploads/1/3/1/0/131069897/wafenezo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fakuwonilojovaxibudebu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9186/0379/files/84389564889.pdf
    • https://cdn.shopify.com/s/files/1/0433/3781/0075/files/58720033087.pdf
    • https://cdn.shopify.com/s/files/1/0430/2068/1369/files/42828975513.pdf
    • https://cdn.shopify.com/s/files/1/0432/6716/2276/files/zarivuxulaxodafuna.pdf
    • https://cdn.shopify.com/s/files/1/0434/8418/4728/files/dotumewujikujizakubegup.pdf
    • https://cdn.shopify.com/s/files/1/0434/0131/4456/files/vegiduxusuno.pdf
    • https://cdn.shopify.com/s/files/1/0433/2781/5833/files/bujakobivukariremodek.pdf
    • https://cdn.shopify.com/s/files/1/0431/5679/9647/files/kelley_blue_book_used_rv_values.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/14985018959.pdf
    • https://cdn.shopify.com/s/files/1/0429/9977/5381/files/kujixorafamasivarowojuput.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066d5.bin
e385f8d771cf4aacba48f461654b4f6e821337cd3e288a08dfd5e82b5d82f11f
pdf-font-stream PDF embedded font (sfnt) at offset 0x66D5 5588 bytes
font_01_sfnt_off000079ce.bin
55c12a47c8801e4784b7a375371c65bba68545c3dd63191cd27091cc902e1275
pdf-font-stream PDF embedded font (sfnt) at offset 0x79CE 10080 bytes