Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1d082a3939d33d6…

MALICIOUS

PDF

44.1 KB Created: 2020-10-20 21:26:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 1fbb3c8f4b3eaa76e701d715059bb287 SHA-1: 9c8550c32e579e30628ae7be6c49fe4d14b07a35 SHA-256: d1d082a3939d33d6f134d23c700886e74e00fe68692d731442a9a4a788644cea
194 Risk Score

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/pify?keyword=operating+system+notes+pdf+galvin In PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/zakeme.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/1867598.pdfIn PDF document text
    • https://wesujugureju.weebly.com/uploads/1/3/0/8/130874517/2831115.pdfIn PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/4928440.pdfIn PDF document text
    • https://biwugina.weebly.com/uploads/1/3/1/1/131163984/37c6e1bb1ae.pdfIn PDF document text
    • https://gukaguse.weebly.com/uploads/1/3/1/3/131398473/kamonaxa_domivejibiji.pdfIn PDF document text
    • https://jubunukaf.weebly.com/uploads/1/3/1/4/131483214/6150248.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/1/0484/6898/3969/files/666901639.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3357/5075/files/wiborakegibuwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7490/4768/files/kilevejef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2017/1426/files/13049347708.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6468/8292/files/rumizolub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/3672/0534/files/62617727569.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0314/9479/files/97772786451.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/5272/8230/files/russell_hobbs_steamglide_iron_cleaning_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7903/5808/files/black_and_decker_40v_battery_walmart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5329/7047/files/high_tech_high_north_county_jobs.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/foruzefosekawipibak.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/52120800006.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1484/8671/files/27756503559.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1701/3912/files/mission_counter_attack_game_download_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/4816/0411/files/jijedeguweluv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/8794/5622/files/papa_pizzeria_games_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/4080/2469/files/jagojivejixixepexixijatom.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_off00006dad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DAD 5548 bytes
SHA-256: 30e4aa67ef0ea286c4ead97e0e9a31d52439fbdc6d9ce6d707f0d7e88157240b
font_01_sfnt_off0000807d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x807D 9980 bytes
SHA-256: 859921eecec084de6ad5046f27303d5b4f07ab07887a0b839bd7b95c5ed5fc85

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